Solutions Assessment Noel Pd 2
Solutions Assessment Bank
- 1.
A mixture in which particles can be seen and easily separated by settling and filtration is a _____
- A.
Suspension
- B.
Solution
- C.
Solute
- D.
Solvent
Correct Answer
A. SuspensionExplanation
A suspension is a mixture in which particles can be seen and easily separated by settling and filtration. In a suspension, the particles are larger and do not dissolve in the solvent. They are suspended throughout the mixture and can be observed with the naked eye. This allows for easy separation of the particles from the rest of the mixture by allowing them to settle at the bottom or by using a filter. Therefore, a suspension is the correct answer for this question.Rate this question:
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- 2.
Solutes lower the freezing point of water by___________
- A.
Stopping water molecules from moving
- B.
Forming crystals
- C.
Making it harder for water to form crystals
- D.
Making the water molecules move faster
Correct Answer
C. Making it harder for water to form crystalsExplanation
Solutes lower the freezing point of water by making it harder for water to form crystals. When solutes are dissolved in water, they disrupt the orderly arrangement of water molecules necessary for the formation of ice crystals. This disruption makes it more difficult for water to freeze and lowers the freezing point of the solution. As a result, the solution requires lower temperatures to solidify compared to pure water.Rate this question:
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- 3.
A polar solvent will most likely dissolve __________.
- A.
Any solute
- B.
Polar solutes
- C.
Nonpolar solutes
- D.
No solute
Correct Answer
B. Polar solutesExplanation
A polar solvent is likely to dissolve polar solutes because polar solvents have a partial positive and partial negative charge, which allows them to interact with and dissolve other polar molecules. This is due to the principle of "like dissolves like," meaning that substances with similar polarity are more likely to dissolve in each other. Nonpolar solutes, on the other hand, are unlikely to dissolve in a polar solvent because they lack the necessary charges to interact with the polar solvent molecules.Rate this question:
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- 4.
A small beaker contains 50 ml of water at 20 degrees Celsius. If three sugar cubes are placed in the beaker, they will eventually dissolve. Which action would speed up the rate at which the sugar cubes dissolve the fastest?
- A.
Use less water initially
- B.
Transfer the contents of the beaker to a larger beaker
- C.
Cool the water and sugar cube mixture to 5 degrees Celsius
- D.
Heat and stir the contents of the beaker
Correct Answer
D. Heat and stir the contents of the beakerExplanation
Heating and stirring the contents of the beaker would speed up the rate at which the sugar cubes dissolve the fastest. When the water is heated, the kinetic energy of the water molecules increases, causing them to move faster. This increased movement helps to break down the sugar cubes more quickly. Stirring the mixture further enhances the dissolution process by increasing the contact between the sugar cubes and the water, allowing for more efficient mixing and dissolution.Rate this question:
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- 5.
Sugar water is an example of _____
- A.
Suspension
- B.
Solution
- C.
Solute
- D.
Colloid
Correct Answer
B. SolutionExplanation
Sugar water is an example of a solution because it is a homogeneous mixture where sugar (the solute) is dissolved in water (the solvent). In a solution, the solute particles are uniformly distributed throughout the solvent, resulting in a clear and well-mixed mixture. In the case of sugar water, the sugar molecules are evenly dispersed in the water, creating a solution.Rate this question:
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- 6.
A solution in which more solute may be dissolved at a given temperature is a _______
- A.
Neutral solution
- B.
Unsaturated solution
- C.
Supersaturated solution
- D.
Saturated solution
Correct Answer
B. Unsaturated solutionExplanation
An unsaturated solution is a solution in which more solute can be dissolved at a given temperature. This means that the solution has not reached its maximum capacity to dissolve the solute and can still accommodate more.Rate this question:
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- 7.
A mixture that contains a small amount of undissolved particles that do not settle out and will scatter light is called a _____.
- A.
Colloid
- B.
Solute
- C.
Solution
- D.
Solvent
Correct Answer
A. ColloidExplanation
A colloid is a mixture that contains small undissolved particles that do not settle out and scatter light. Unlike a solution, where the solute is completely dissolved in the solvent, a colloid has particles that are larger and do not dissolve. These particles are dispersed throughout the mixture and can scatter light, giving the colloid a cloudy or milky appearance. Therefore, a mixture that contains a small amount of undissolved particles that scatter light is called a colloid.Rate this question:
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- 8.
The substance found in a solution in the smallest amount is a called a _____________
- A.
Mixture
- B.
Solvent
- C.
Colloid
- D.
Solute
Correct Answer
D. SoluteExplanation
The substance found in a solution in the smallest amount is called a solute. In a solution, the solute is the component that is dissolved in the solvent. It is typically present in lesser quantity compared to the solvent. The solute can be a solid, liquid, or gas, and it is dispersed evenly throughout the solvent. In this context, the other options are not correct. A mixture refers to a combination of two or more substances, while a solvent is the component that dissolves the solute. A colloid is a type of mixture where particles are dispersed but not dissolved.Rate this question:
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- 9.
The measure of how much solute can dissolve in a solvent at a given temperature is called ____.
- A.
Saturation Point
- B.
Solubility
- C.
Concentration
Correct Answer
B. SolubilityExplanation
Solubility is the measure of how much solute can dissolve in a solvent at a given temperature. It indicates the maximum amount of solute that can be dissolved in a solvent to form a saturated solution. Saturation point refers to the point at which no more solute can be dissolved in the solvent. Concentration, on the other hand, refers to the amount of solute present in a given amount of solvent or solution. Therefore, solubility is the correct answer as it specifically refers to the measure of how much solute can dissolve in a solvent.Rate this question:
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- 10.
The three factors that affect solubility are ______.
- A.
Pressure, type of mixture, temperature
- B.
Pressure, type of solvent, temperature
- C.
Type of solvent, type of mixture, how much solution is stirred
- D.
Stirring, pressure, type of solvent
Correct Answer
B. Pressure, type of solvent, temperatureExplanation
The solubility of a substance refers to its ability to dissolve in a particular solvent. Pressure affects solubility because an increase in pressure can force more gas molecules into a solvent, increasing the solubility of gases. The type of solvent also affects solubility because different solvents have different chemical properties that can either enhance or hinder the dissolution of a solute. Temperature also plays a role as it affects the kinetic energy of molecules, which in turn affects the solubility of a substance. Higher temperatures generally increase solubility for solid solutes, while for gas solutes, higher temperatures decrease solubility.Rate this question:
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- 11.
If you add a solute to a dilute solution, the solution becomes more
- A.
Staurated
- B.
Concentrated
- C.
Superstaurated
- D.
Better mixed
Correct Answer
B. ConcentratedExplanation
When a solute is added to a dilute solution, the concentration of the solution increases. This means that there is a higher amount of solute particles in the same volume of solvent. The term "concentrated" refers to a solution that has a high amount of solute relative to the amount of solvent. Therefore, the correct answer is "Concentrated."Rate this question:
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- 12.
Select all the choices below that are considered a colloid.
- A.
Milk
- B.
Gelatin
- C.
Water
- D.
Fog
Correct Answer(s)
A. Milk
B. Gelatin
D. FogExplanation
The choices that are considered colloids are milk, gelatin, and fog. Milk is a colloid because it consists of small droplets of fat dispersed in water. Gelatin is a colloid because it forms a gel-like substance when mixed with water, with the water molecules trapped within the gel structure. Fog is a colloid because it is composed of tiny water droplets suspended in the air, creating a cloudy appearance.Rate this question:
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- 13.
Select all the choices below that are considered a suspension.
- A.
Italian salad dressing
- B.
Sandy water
- C.
Windex
- D.
Some medicines
Correct Answer(s)
A. Italian salad dressing
B. Sandy water
D. Some medicinesExplanation
Italian salad dressing, sandy water, and some medicines are considered suspensions because they all consist of solid particles (or droplets) dispersed in a liquid. In Italian salad dressing, small solid particles of herbs and spices are suspended in oil and vinegar. Sandy water is a suspension because it contains solid particles of sand dispersed in water. Some medicines, particularly liquid ones, can be suspensions where solid particles of the active ingredient are dispersed in a liquid to ensure proper dosage. Windex, on the other hand, is not a suspension but a solution, as it contains dissolved solutes rather than suspended particles.Rate this question:
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- 14.
Select all the choices below that are considered a solution.
- A.
Water
- B.
Food color in water
- C.
Windex
- D.
Mayonaise
Correct Answer(s)
A. Water
B. Food color in water
C. WindexExplanation
The choices "Water," "Food color in water," and "Windex" are considered solutions because they are all substances that can dissolve or mix with other substances to form a homogeneous mixture. Water is a universal solvent and can dissolve many different solutes, making it a common solution. Food color in water is also a solution as the food color dissolves in the water to create a colored liquid. Windex is a solution as it is a mixture of various chemicals and solvents that can be used for cleaning purposes. Mayonnaise, on the other hand, is not considered a solution as it is an emulsion, which is a mixture of two immiscible substances.Rate this question:
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- 15.
How does a solute, when added to a solvent, affect the freezing point of the solvent
- A.
Raises the freezing point
- B.
Lowers the freezing point
- C.
Does not affect the freezing point
Correct Answer
B. Lowers the freezing pointExplanation
When a solute is added to a solvent, it lowers the freezing point of the solvent. This is because the solute particles disrupt the orderly arrangement of the solvent particles, making it more difficult for the solvent to form a solid lattice structure. As a result, the solvent requires a lower temperature to freeze, hence lowering its freezing point. This phenomenon is known as freezing point depression and is commonly observed in solutions, such as antifreeze solutions used in car radiators.Rate this question:
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- 16.
How does a scientist measure concentration?
- A.
The measure of how much solute can be dissolved in a solvent at a given temperature
- B.
The measure of how much solvent can be dissolved in a solute at a given temperature
- C.
The measure of how much solute can be dissolved in a solvent
- D.
The measure of how much solvent can be dissolved in a solute
Correct Answer
A. The measure of how much solute can be dissolved in a solvent at a given temperatureExplanation
A scientist measures concentration by determining the amount of solute that can be dissolved in a given amount of solvent at a specific temperature. This measurement helps in understanding the strength or amount of a particular substance in a solution.Rate this question:
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- 17.
As the pressure of a liquid decreases
- A.
Less gas can be dissolved in the liquid
- B.
More gas can be dissolved in the liquid
- C.
The decrease in temperature makes no difference
Correct Answer
A. Less gas can be dissolved in the liquidExplanation
When the pressure of a liquid decreases, the solubility of gases in the liquid also decreases. This is because the solubility of gases is directly proportional to the pressure. As the pressure decreases, there is less force pushing the gas molecules into the liquid, resulting in less gas being dissolved. Therefore, less gas can be dissolved in the liquid when the pressure decreases.Rate this question:
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- 18.
In the graph below, which of the variables is the manipulated (independent) variable?
- A.
Solubility
- B.
Temperature
Correct Answer
B. TemperatureExplanation
The manipulated (independent) variable is the variable that is intentionally changed or controlled in an experiment. In this case, the graph is showing the relationship between solubility and temperature. Temperature is the variable that is being manipulated or changed in order to observe its effect on solubility.Rate this question:
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- 19.
In the graph below, which solid shows the greatest change in solubility with temperature?
- A.
KNO3
- B.
NaNO3
- C.
KBr
- D.
NH4Cl
- E.
Yb2(SO4)3
Correct Answer
B. NaNO3Explanation
NaNO3 shows the greatest change in solubility with temperature because it has the steepest slope on the graph. This indicates that the solubility of NaNO3 increases significantly as temperature increases.Rate this question:
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- 20.
Using the graph below, at approximately what temperature will 100g of water dissolve equal amounts oh KNO3 and KBr?
- A.
32
- B.
55
- C.
72
- D.
22
Correct Answer
B. 55Explanation
Based on the graph, it can be observed that at a temperature of approximately 55 degrees, the solubility of both KNO3 and KBr is equal. Therefore, at this temperature, 100g of water will dissolve equal amounts of KNO3 and KBr.Rate this question:
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- 21.
A mixture in which no more solute can be dissolved is called
- A.
Saturated
- B.
Supersaturated
- C.
Unsaturated
Correct Answer
A. SaturatedExplanation
A saturated mixture is one in which no more solute can be dissolved. This means that the maximum amount of solute has already been dissolved in the solvent, and any additional solute will not dissolve further. In a saturated solution, the solute is in equilibrium with the solvent, and any excess solute will precipitate out.Rate this question:
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- 22.
A solution that has more dissolved solute than is predicted by its solubility at a given temperature is called
- A.
Saturated
- B.
Supersaturated
- C.
Unsaturated
Correct Answer
B. SupersaturatedExplanation
A solution that has more dissolved solute than is predicted by its solubility at a given temperature is called supersaturated. This means that the solution is holding more solute than it should be able to at that temperature. It is achieved by adding more solute to a saturated solution and then cooling it down slowly, which prevents the excess solute from precipitating out. Supersaturated solutions are unstable and any disturbance can cause the excess solute to come out of the solution and form crystals.Rate this question:
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- 23.
The concentration of a solution is measured by....
- A.
Comparing the amount of solute the amount of solvent
- B.
Comparing the amount of solvent to the amount of solute
- C.
Comparing the amount of the solute to the amount of solvent or the total amount of solution
- D.
None of the answers given is correct
Correct Answer
C. Comparing the amount of the solute to the amount of solvent or the total amount of solutionExplanation
The concentration of a solution is determined by comparing the amount of solute (the substance being dissolved) to the amount of solvent (the substance doing the dissolving) or the total amount of solution. This comparison allows us to understand the relative proportion of solute to solvent in the solution, which is a key factor in determining its concentration.Rate this question:
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- 24.
What is the best way to change the concentration of a solution
- A.
Add more solute
- B.
Add more solvent
- C.
Add more solute or change the amount of solvent
- D.
None of the answers given are correct
Correct Answer
C. Add more solute or change the amount of solventExplanation
The best way to change the concentration of a solution is to either add more solute or change the amount of solvent. By adding more solute, the concentration of the solution will increase. On the other hand, by changing the amount of solvent, the concentration can be adjusted by diluting the solution or making it more concentrated. Therefore, both options of adding more solute or changing the amount of solvent can effectively alter the concentration of a solution.Rate this question:
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- 25.
The higher the pressure the of the gas over the solvent the more gas can be dissolved.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
When the pressure of a gas over a solvent increases, it creates a greater force pushing the gas molecules into the solvent. This increased pressure allows more gas molecules to dissolve in the solvent, resulting in a higher solubility. Therefore, the statement is true.Rate this question:
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- 26.
The expression "like dissolves like" means
- A.
None of the answers given are correct
- B.
Polar dissolves polar
- C.
Polar will dissolve nonpolar
- D.
Nonpolar will dissolve polar
Correct Answer
B. Polar dissolves polarExplanation
The expression "like dissolves like" refers to the principle that substances with similar polarities will dissolve in each other. In this case, the correct answer is "Polar dissolves polar" because polar substances, which have partial positive and negative charges, can dissolve other polar substances due to their similar polarity. This is because the positive and negative charges of the polar molecules are attracted to each other, allowing them to mix and dissolve.Rate this question:
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- 27.
In a solution created from dissolving an ionic compound in water which of the following is true?
- A.
The ionic compound is broken down into ions
- B.
The ionic compound dissolves as molecules
- C.
The ionic compound will not dissolve
Correct Answer
A. The ionic compound is broken down into ionsExplanation
When an ionic compound is dissolved in water, it undergoes a process called dissociation, where the compound breaks down into its constituent ions. This occurs because water molecules surround the ions and pull them apart, due to the attraction between the partial charges of the water molecules and the charged ions. Therefore, the correct answer is that the ionic compound is broken down into ions.Rate this question:
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- 28.
In a solution created by dissolving a molecular solid in water which is true?
- A.
The molecules are broken down and dissolved as ions
- B.
The slightly polar molecules are attracted to and dissolved by the polar water molecules
- C.
The molecules do not dissolve
Correct Answer
B. The slightly polar molecules are attracted to and dissolved by the polar water moleculesExplanation
In a solution created by dissolving a molecular solid in water, the slightly polar molecules are attracted to and dissolved by the polar water molecules. This is because water is a polar solvent, meaning it has a partial positive charge on the hydrogen atoms and a partial negative charge on the oxygen atom. The slightly polar molecules in the solid are attracted to these charges and become surrounded by water molecules, resulting in their dissolution in the solution.Rate this question:
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- 29.
Solutes affect the freezing point of a solution by...
- A.
Raising the freezing point
- B.
Lowering the freezing point
- C.
Not changing the freezing point
Correct Answer
B. Lowering the freezing pointExplanation
Solutes affect the freezing point of a solution by lowering it. When a solute is dissolved in a solvent, it disrupts the formation of crystal lattice structures that usually occur during freezing. This disruption prevents the solvent molecules from arranging themselves in an organized manner, making it more difficult for them to solidify. As a result, the freezing point of the solution is lower than that of the pure solvent.Rate this question:
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- 30.
Solutes affect the boiling point of a solution by....
- A.
Lowering the boiling point
- B.
Raising the boiling point
- C.
Solutes do not affect the boiling point
Correct Answer
B. Raising the boiling pointExplanation
Solutes affect the boiling point of a solution by raising it. When a solute is added to a solvent, the boiling point of the solution increases compared to the pure solvent. This is because the presence of solute particles disrupts the intermolecular forces between solvent molecules, making it harder for the solvent molecules to escape into the vapor phase. As a result, more heat is required to reach the boiling point, causing the boiling point to be higher than that of the pure solvent.Rate this question:
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- 31.
An example of the gas in gas solution is a(n) _____________.
- A.
Dental Filling
- B.
Air
- C.
Soda Water
- D.
Ocean water
Correct Answer
B. AirExplanation
Air is an example of a gas in a gas solution because it is a mixture of different gases such as nitrogen, oxygen, carbon dioxide, and others. These gases are uniformly distributed and do not separate into distinct layers or phases. Air is a common example of a gas solution as it is a mixture of gases that are blended together and can be found in the Earth's atmosphere.Rate this question:
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- 32.
Which is an example of a solid in liquid solution.
- A.
Air
- B.
Soda Water
- C.
Ocean Water
- D.
Antifreeze
Correct Answer
C. Ocean WaterExplanation
Ocean water is an example of a solid in liquid solution because it contains dissolved salts and minerals. These salts and minerals, such as sodium chloride and magnesium sulfate, are solids that have dissolved in the water. Therefore, ocean water can be considered a solid in liquid solution.Rate this question:
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- 33.
A solution with an ionic solute dissolved in it will differ from a solution with a molecular solute dissolved in it because _____
- A.
Ionic solutions will conduct electricity
- B.
Ionic solutions will not conduct electricity
- C.
Ionic solutes will not dissolve in a solution
- D.
Molecular solutes will not dissolve in a solution
Correct Answer
A. Ionic solutions will conduct electricityExplanation
Ionic solutions will conduct electricity because they contain ions that are free to move and carry an electric charge. When an electric current is applied to an ionic solution, the positive ions move towards the negative electrode and the negative ions move towards the positive electrode, allowing the current to flow. In contrast, molecular solutes do not dissociate into ions and therefore do not conduct electricity.Rate this question:
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Mar 14, 2023Quiz Edited by
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Dec 19, 2013Quiz Created by
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