Mr Canning´s Solutions Quiz

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| By MrCanning

MrCanning

Community Contributor

Quizzes Created: 2 | Total Attempts: 907

Questions: 10 | Attempts: 347 | Updated: Mar 22, 2023

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A pre-knowledge quiz about solutions and concentrations.

Questions and Answers

1.

A solute is the component...
- A.
  
  Added to water
- B.
  
  Dissolved in the solution
- C.
  
  Dissolved in the solvent
- D.
  
  Added to the other solute
Correct Answer
C. Dissolved in the solvent

Explanation
A solute is the component that is dissolved in the solvent. In a solution, the solute is the substance that is present in a smaller amount and gets dissolved by the solvent. The solvent is the substance that is present in a larger amount and dissolves the solute. Therefore, the correct answer is "dissolved in the solvent."

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2.

Sugar is a solute in a cup of coffee.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
In a cup of coffee, sugar is added to the liquid, making it a solute. A solute is a substance that is dissolved in a solvent, which in this case is the coffee. Therefore, the statement "Sugar is a solute in a cup of coffee" is true.

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3.

What is the solvent in blood?
- A.
  
  Red blood cells
- B.
  
  Plasma
- C.
  
  Salts
- D.
  
  Water
Correct Answer
A. Red blood cells

Explanation
The solvent in blood is not red blood cells, but rather plasma. Plasma is the liquid component of blood that carries red blood cells, white blood cells, platelets, and other substances throughout the body. It is mainly composed of water, electrolytes (salts), proteins, hormones, and waste products. Red blood cells are the most abundant cellular component of blood and are responsible for carrying oxygen to the body's tissues. However, they are not the solvent in blood.

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4.

The gas called is a solute in coca cola.

Correct Answer
carbon dioxide, Carbon dioxide, Carbon Dioxide, CO2

Explanation
The gas that is a solute in Coca Cola is carbon dioxide. Carbon dioxide is commonly used in carbonated beverages like Coca Cola to create the fizz and bubbles. It is represented by the chemical formula CO2.

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4
5.

Moles = mass (g) /

Correct Answer
molecular mass, molar mass, Molar mass, Molecular Mass

Explanation
The formula for calculating moles is mass (g) divided by molecular mass or molar mass. The terms "molecular mass," "molar mass," "Molar mass," and "Molecular Mass" all refer to the same concept, which is the mass of one mole of a substance. Therefore, any of these terms can be used interchangeably in the formula to calculate moles.

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4
6.

What are the units of molecular mass (molar mass)?
- A.
  
  Mol/g
- B.
  
  G mol
- C.
  
  G/mol
- D.
  
  G
Correct Answer
C. G/mol

Explanation
The units of molecular mass (molar mass) are expressed as grams per mole (g/mol). This means that the mass of a substance is measured in grams, while the amount of substance is measured in moles. The ratio of the mass to the amount of substance gives the molar mass, which is commonly used in chemical calculations and stoichiometry.

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7.

Which of these can be used to calculate a concentration?
- A.
  
  Grams per litre
- B.
  
  Molarity
- C.
  
  Molality
- D.
  
  Molar fraction
Correct Answer(s)
A. Grams per litre
B. Molarity
C. Molality
D. Molar fraction

Explanation
Grams per litre, Molarity, Molality, and Molar fraction can all be used to calculate concentration. Grams per litre is a measure of the mass of solute per unit volume of solution. Molarity is the number of moles of solute per litre of solution. Molality is the number of moles of solute per kilogram of solvent. Molar fraction is the ratio of the number of moles of a component to the total number of moles in the solution. Each of these measures allows for the determination of concentration in different ways.

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8.

Molarity is the number of moles of solute divided by the volume of the solvent.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
It must be the volume of solution.

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9.

Molality is the number of moles divided by the mass ( ) of solvent.

Correct Answer
kilograms, Kilograms, Kg

Explanation
Molality is a measure of concentration that represents the number of moles of solute per kilogram of solvent. In this case, the correct answer options are all units of mass that can be used to express the mass of the solvent in the molality equation. Therefore, the answer options "kilograms," "Kilograms," and "Kg" are all correct.

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4