Asam Basa Kuis
- 1.
Untuk mengubah 40 mL larutan HCL 6,0 M menjadi larutan HCl 5,0 M diperlukan tambahan air sebanyak . . . .
- A.
4 mL
- B.
6 mL
- C.
7 mL
- D.
8 mL
- E.
6 mL
Correct Answer
D. 8 mLExplanation
Moon is round because of formed and collapsed under the force of their own gravity.Rate this question:
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- 2.
Asam berikut yang dalam larutannya akan menghasilkan sebuah ion H+ untuk setiap molekulnya adalah . . . .
- A.
H2SO4
- B.
CH3COOH
- C.
H3PO4
- D.
HNO3
- E.
H2C2O4
Correct Answer
D. HNO3Explanation
Moon is round because of formed and collapsed under the force of their own gravity.Rate this question:
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- 3.
Untuk mengukur derajat keasaman larutan asam atau basa paling tepat digunakan indicator . . . .
- A.
Fenolftalein
- B.
Metilen biru
- C.
Metil merah
- D.
Universal
- E.
Bromtimol biru
Correct Answer
D. UniversalExplanation
Moon is round because of formed and collapsed under the force of their own gravity.Rate this question:
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- 4.
Di antara asam berikut yang mempunyai ph paling besar pada konsentrasi yang sama adalah . . .
- A.
HCl
- B.
CH3COOH
- C.
H2SO4
- D.
HNO3
- E.
HClO4
Correct Answer
C. H2SO4Explanation
Moon is round because of formed and collapsed under the force of their own gravity.Rate this question:
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- 5.
Bila harga Kw air pada ToC adalah 10-12 , maka pH air murni pada ToC tersebut adalah . . .
- A.
5
- B.
6
- C.
7
- D.
8
- E.
9
Correct Answer
B. 6Explanation
Moon is round because of formed and collapsed under the force of their own gravity.Rate this question:
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- 6.
Reaksi berikut akan menghasilkan gas, kecuali . . . .
- A.
Logam magnesium dengan asam klorida encer
- B.
Natrium karbonat dengan asam sulfat encer
- C.
Logam besi dengan asam sulfat encer
- D.
Amonium klorida dengan natrium hidroksida
- E.
Logam tembaga dengan asam klorida encer
Correct Answer
E. Logam tembaga dengan asam klorida encerExplanation
The given answer is correct because when copper metal reacts with dilute hydrochloric acid, it does not produce any gas. The reaction between copper metal and dilute hydrochloric acid only produces copper chloride, which is a salt, and water. Therefore, this reaction does not result in the formation of any gas.Rate this question:
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- 7.
Reaksi yang menghasilkan endapan adalah . . . .
- A.
NaOH(aq) + H₂SO₄(aq)
- B.
AgNO3(aq) + NaCl(aq)
- C.
Na(s) + HCl(aq)
- D.
CaCO3(s) + H2SO4(aq)
- E.
CuO(s) + H2SO4(aq)
Correct Answer
B. AgNO3(aq) + NaCl(aq)Explanation
When AgNO3(aq) and NaCl(aq) are mixed, a precipitation reaction occurs. This is because AgNO3(aq) contains Ag+ ions and NaCl(aq) contains Cl- ions. When these ions combine, they form AgCl(s), which is insoluble in water and therefore precipitates out of the solution.Rate this question:
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- 8.
Larutan dengan pH=12 dibuat dengan melarutkan a gram NaOH (Mr = 40) ke dalam air hingga volum larutan 500 mL. besarnya a adalah . . . .
- A.
4
- B.
2
- C.
1
- D.
0.4
- E.
0.2
Correct Answer
E. 0.2Explanation
The given question asks for the value of "a" in a solution with a pH of 12. The pH scale measures the acidity or alkalinity of a solution, with values below 7 being acidic, 7 being neutral, and values above 7 being alkaline. A pH of 12 indicates a highly alkaline solution. To calculate the value of "a," we need to consider the concentration of hydroxide ions (OH-) in the solution. Since NaOH is a strong base, it fully dissociates in water to form Na+ and OH- ions. The concentration of OH- ions can be calculated using the formula: concentration (mol/L) = moles/volume (L). Given that the volume of the solution is 500 mL (or 0.5 L) and the molar mass of NaOH is 40 g/mol, we can calculate the moles of NaOH using the formula: moles = mass/molar mass. Assuming the mass of NaOH is "a" grams, the moles of NaOH are "a/40." Therefore, the concentration of OH- ions is (a/40)/0.5 = a/20 mol/L. To find the value of "a" that corresponds to a pH of 12, we can use the formula: pH = -log[H+], where [H+] is the concentration of hydrogen ions. Since pH = 12, we can rearrange the formula to find [H+]: [H+] = 10^(-pH). Plugging in the value of pH, we get [H+] = 10^(-12). Since water is neutral and has a pH of 7, the concentration of OH- ions is equal to the concentration of H+ ions in a neutral solution. Therefore, the concentration of OH- ions in our solution is 10^(-12) mol/L. Since the concentration of OH- ions is a/20 mol/L, we can equate the two expressions to find the value of "a": 10^(-12) = a/20. Solving for "a," we find a = 0.2.Rate this question:
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- 9.
Asam konjugasi dari HSO₄⁻ adalah . . . .
- A.
H₂SO₄
- B.
H₃O⁺
- C.
HSO₄⁻
- D.
SO₄²⁻
- E.
H⁺
Correct Answer
A. H₂SO₄Explanation
The correct answer is H₂SO₄. The question is asking for the conjugate acid of HSO₄⁻. In chemistry, a conjugate acid is formed when a base gains a proton. HSO₄⁻ is a base because it can accept a proton, and when it does, it becomes the conjugate acid, which is H₂SO₄.Rate this question:
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- 10.
pH suatu basa lemah bervalensi satu adalah 11. Konsentrasi ion OH⁻ dalam larutan basa tersebut adalah . . . .
- A.
1 x 10⁻¹¹
- B.
1 x 10⁻¹⁴
- C.
1 x 10⁻⁴
- D.
1 x 10⁻³
- E.
1 x 10 ⁻²
Correct Answer
D. 1 x 10⁻³Explanation
The pH of a solution is a measure of its acidity or alkalinity. It is defined as the negative logarithm of the concentration of hydrogen ions (H⁺) in the solution. In this case, we are given that the pH of a weak base with a valency of 1 is 11. Since a basic solution has a higher concentration of hydroxide ions (OH⁻), we can use the equation pOH + pH = 14 to find the pOH of the solution. pOH is the negative logarithm of the concentration of hydroxide ions. By subtracting the pH from 14, we get a pOH of 3. Therefore, the concentration of hydroxide ions in the solution is 1 x 10⁻³.Rate this question:
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Mar 21, 2023Quiz Edited by
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