Directly related questions
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18M.2.hl.TZ1.5a:
Predict, giving a reason, a difference between the reactions of the same concentrations of hydrochloric acid and ethanoic acid with samples of calcium carbonate.
-
18M.2.hl.TZ1.5a:
Predict, giving a reason, a difference between the reactions of the same concentrations of hydrochloric acid and ethanoic acid with samples of calcium carbonate.
-
18M.2.hl.TZ1.a:
Predict, giving a reason, a difference between the reactions of the same concentrations of hydrochloric acid and ethanoic acid with samples of calcium carbonate.
-
18M.2.sl.TZ1.5a:
Predict, giving a reason, a difference between the reactions of the same concentrations of hydrochloric acid and ethanoic acid with samples of calcium carbonate.
-
18M.2.sl.TZ1.5a:
Predict, giving a reason, a difference between the reactions of the same concentrations of hydrochloric acid and ethanoic acid with samples of calcium carbonate.
-
18M.2.sl.TZ1.a:
Predict, giving a reason, a difference between the reactions of the same concentrations of hydrochloric acid and ethanoic acid with samples of calcium carbonate.
- 18M.1.sl.TZ2.20: Which statement is correct? A. A strong acid is a good proton donor and has a strong...
- 18M.1.sl.TZ2.20: Which statement is correct? A. A strong acid is a good proton donor and has a strong...
- 21N.1.sl.TZ0.20: Which ions are present in an aqueous solution of Na2CO3? I. HCO3−II. OH−III. CO32− A. I and...
- 21N.1.sl.TZ0.20: Which ions are present in an aqueous solution of Na2CO3? I. HCO3−II. OH−III. CO32− A. I and...
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22M.1.sl.TZ2.20:
What is the strongest acid in the equation below?
H3AsO4 + H2O H2AsO4− + H3O+ Kc = 4.5 × 10−4
A. H3AsO4
B. H2O
C. H2AsO4−
D. H3O+
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22M.1.sl.TZ2.20:
What is the strongest acid in the equation below?
H3AsO4 + H2O H2AsO4− + H3O+ Kc = 4.5 × 10−4
A. H3AsO4
B. H2O
C. H2AsO4−
D. H3O+
- 22M.2.sl.TZ2.3c(ii): State the meaning of a strong Brønsted–Lowry acid.
- 22M.2.sl.TZ2.3c(ii): State the meaning of a strong Brønsted–Lowry acid.
- 22M.2.sl.TZ2.c(ii): State the meaning of a strong Brønsted–Lowry acid.
- 22M.2.hl.TZ2.6d(ii): State the meaning of a strong Brønsted–Lowry acid.
- 22M.2.hl.TZ2.6d(ii): State the meaning of a strong Brønsted–Lowry acid.
- 22M.2.hl.TZ2.d(ii): State the meaning of a strong Brønsted–Lowry acid.
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19M.2.hl.TZ1.5a:
Outline why ethanoic acid is classified as a weak acid.
-
19M.2.hl.TZ1.5a:
Outline why ethanoic acid is classified as a weak acid.
-
19M.2.hl.TZ1.a:
Outline why ethanoic acid is classified as a weak acid.
-
19M.2.hl.TZ2.5a(i):
Distinguish between a weak and strong acid.
Weak acid:
Strong acid:
-
19M.2.hl.TZ2.5a(i):
Distinguish between a weak and strong acid.
Weak acid:
Strong acid:
-
19M.2.hl.TZ2.a(i):
Distinguish between a weak and strong acid.
Weak acid:
Strong acid:
-
19M.2.sl.TZ2.5a(i):
Distinguish between a weak and strong acid.
Weak acid:
Strong acid:
-
19M.2.sl.TZ2.5a(i):
Distinguish between a weak and strong acid.
Weak acid:
Strong acid:
-
19M.2.sl.TZ2.a(i):
Distinguish between a weak and strong acid.
Weak acid:
Strong acid:
- 19N.2.hl.TZ0.4b: Outline two laboratory methods of distinguishing between solutions of citric acid and...
- 19N.2.hl.TZ0.4b: Outline two laboratory methods of distinguishing between solutions of citric acid and...
- 19N.2.hl.TZ0.b: Outline two laboratory methods of distinguishing between solutions of citric acid and...
- 19N.2.hl.TZ0.4a(ii): The value of Ka at 298 K for the first dissociation is 5.01 × 10−4. State, giving a reason, the...
- 19N.2.hl.TZ0.4a(ii): The value of Ka at 298 K for the first dissociation is 5.01 × 10−4. State, giving a reason, the...
- 19N.2.hl.TZ0.a(ii): The value of Ka at 298 K for the first dissociation is 5.01 × 10−4. State, giving a reason, the...
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19N.2.sl.TZ0.4a(iii):
The dissociation of citric acid is an endothermic process. State the effect on the hydrogen ion concentration, [H+], and on the equilibrium constant, of increasing the temperature.
-
19N.2.sl.TZ0.4a(iii):
The dissociation of citric acid is an endothermic process. State the effect on the hydrogen ion concentration, [H+], and on the equilibrium constant, of increasing the temperature.
-
19N.2.sl.TZ0.a(iii):
The dissociation of citric acid is an endothermic process. State the effect on the hydrogen ion concentration, [H+], and on the equilibrium constant, of increasing the temperature.
-
22N.1.hl.TZ0.23:
Which of these changes would shift the equilibrium to the right?
[Co(H2O)6]2+ (aq) + 4Cl− (aq) [CoCl4]2− (aq) + 6H2O (l)
I. Addition of 0.01 M HCl
II. Addition of concentrated HCl
III. Evaporation of water
A. I and II onlyB. I and III only
C. II and III only
D. I, II and III
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22N.1.hl.TZ0.23:
Which of these changes would shift the equilibrium to the right?
[Co(H2O)6]2+ (aq) + 4Cl− (aq) [CoCl4]2− (aq) + 6H2O (l)
I. Addition of 0.01 M HCl
II. Addition of concentrated HCl
III. Evaporation of water
A. I and II onlyB. I and III only
C. II and III only
D. I, II and III
- 17N.2.hl.TZ0.1e: Suggest why the enthalpy change of neutralization of CH3COOH is less negative than that of HCl.
- 17N.2.hl.TZ0.1e: Suggest why the enthalpy change of neutralization of CH3COOH is less negative than that of HCl.
- 17N.2.hl.TZ0.e: Suggest why the enthalpy change of neutralization of CH3COOH is less negative than that of HCl.
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18M.2.sl.TZ2.2b.ii:
State and explain the effect on the rate of reaction if ethanoic acid of the same concentration is used in place of hydrochloric acid.
-
18M.2.sl.TZ2.2b.ii:
State and explain the effect on the rate of reaction if ethanoic acid of the same concentration is used in place of hydrochloric acid.
-
18M.2.sl.TZ2.b.ii:
State and explain the effect on the rate of reaction if ethanoic acid of the same concentration is used in place of hydrochloric acid.
-
18N.1.sl.TZ0.20:
What is the order of increasing pH for the following solutions of the same concentration?
A. HCl (aq) < NH3 (aq) < NaOH (aq) < CH3COOH (aq)
B. CH3COOH (aq) < HCl (aq) < NH3 (aq) < NaOH (aq)
C. HCl (aq) < CH3COOH (aq) < NH3 (aq) < NaOH (aq)
D. NaOH (aq) < NH3 (aq) < CH3COOH (aq) < HCl (aq)
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18N.1.sl.TZ0.20:
What is the order of increasing pH for the following solutions of the same concentration?
A. HCl (aq) < NH3 (aq) < NaOH (aq) < CH3COOH (aq)
B. CH3COOH (aq) < HCl (aq) < NH3 (aq) < NaOH (aq)
C. HCl (aq) < CH3COOH (aq) < NH3 (aq) < NaOH (aq)
D. NaOH (aq) < NH3 (aq) < CH3COOH (aq) < HCl (aq)
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18N.2.sl.TZ0.6a:
State the equation for the reaction of each substance with water.
-
18N.2.sl.TZ0.6a:
State the equation for the reaction of each substance with water.
-
18N.2.sl.TZ0.a:
State the equation for the reaction of each substance with water.
-
18N.2.hl.TZ0.6a.i:
State the equation for the reaction of each substance with water.
-
18N.2.hl.TZ0.6a.i:
State the equation for the reaction of each substance with water.
-
18N.2.hl.TZ0.a.i:
State the equation for the reaction of each substance with water.
-
19M.2.sl.TZ1.5a:
Outline why ethanoic acid is classified as a weak acid.
-
19M.2.sl.TZ1.5a:
Outline why ethanoic acid is classified as a weak acid.
-
19M.2.sl.TZ1.a:
Outline why ethanoic acid is classified as a weak acid.
-
19N.2.hl.TZ0.4a(iii):
The dissociation of citric acid is an endothermic process. State the effect on the hydrogen ion concentration, [H+], and on Ka, of increasing the temperature.
-
19N.2.hl.TZ0.4a(iii):
The dissociation of citric acid is an endothermic process. State the effect on the hydrogen ion concentration, [H+], and on Ka, of increasing the temperature.
-
19N.2.hl.TZ0.a(iii):
The dissociation of citric acid is an endothermic process. State the effect on the hydrogen ion concentration, [H+], and on Ka, of increasing the temperature.
-
19N.3.sl.TZ0.16a:
Identify the compound responsible for the acidity of gastric juice, and state whether it is a strong or weak acid.
-
19N.3.sl.TZ0.16a:
Identify the compound responsible for the acidity of gastric juice, and state whether it is a strong or weak acid.
-
19N.3.sl.TZ0.a:
Identify the compound responsible for the acidity of gastric juice, and state whether it is a strong or weak acid.
- 19N.2.sl.TZ0.4a(ii): The value of the equilibrium constant for the first dissociation at 298 K is 5.01 × 10−4. State,...
- 19N.2.sl.TZ0.4a(ii): The value of the equilibrium constant for the first dissociation at 298 K is 5.01 × 10−4. State,...
- 19N.2.sl.TZ0.a(ii): The value of the equilibrium constant for the first dissociation at 298 K is 5.01 × 10−4. State,...
- 19N.2.sl.TZ0.4b: Outline one laboratory methods of distinguishing between solutions of citric acid and...
- 19N.2.sl.TZ0.4b: Outline one laboratory methods of distinguishing between solutions of citric acid and...
- 19N.2.sl.TZ0.b: Outline one laboratory methods of distinguishing between solutions of citric acid and...
-
20N.1.sl.TZ0.20:
Which of these acids has the weakest conjugate base?
A.
B.
C.
D.
-
20N.1.sl.TZ0.20:
Which of these acids has the weakest conjugate base?
A.
B.
C.
D.
- 20N.2.sl.TZ0.1c(i): Hypochlorous acid is considered a weak acid. Outline what is meant by the term weak acid.
- 20N.2.sl.TZ0.1c(i): Hypochlorous acid is considered a weak acid. Outline what is meant by the term weak acid.
- 20N.2.sl.TZ0.c(i): Hypochlorous acid is considered a weak acid. Outline what is meant by the term weak acid.
- 20N.2.hl.TZ0.1c(i): Hypochlorous acid is considered a weak acid. Outline what is meant by the term weak acid.
- 20N.2.hl.TZ0.1c(i): Hypochlorous acid is considered a weak acid. Outline what is meant by the term weak acid.
- 20N.2.hl.TZ0.c(i): Hypochlorous acid is considered a weak acid. Outline what is meant by the term weak acid.
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21M.2.sl.TZ1.2b(ii):
Saturated aqueous hydrogen sulfide has a concentration of 0.10 mol dm−3 and a pH of 4.0. Demonstrate whether it is a strong or weak acid.
-
21M.2.sl.TZ1.2b(ii):
Saturated aqueous hydrogen sulfide has a concentration of 0.10 mol dm−3 and a pH of 4.0. Demonstrate whether it is a strong or weak acid.
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21M.2.sl.TZ1.b(ii):
Saturated aqueous hydrogen sulfide has a concentration of 0.10 mol dm−3 and a pH of 4.0. Demonstrate whether it is a strong or weak acid.
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22M.1.sl.TZ2.30:
20 cm3 of 1 mol dm−3 sulfuric acid was added dropwise to 20 cm3 of 1 mol dm−3 barium hydroxide producing a precipitate of barium sulfate.
H2SO4 (aq) + Ba(OH)2 (aq) → 2H2O (l) + BaSO4 (s)
Which graph represents a plot of conductivity against volume of acid added?
-
22M.1.sl.TZ2.30:
20 cm3 of 1 mol dm−3 sulfuric acid was added dropwise to 20 cm3 of 1 mol dm−3 barium hydroxide producing a precipitate of barium sulfate.
H2SO4 (aq) + Ba(OH)2 (aq) → 2H2O (l) + BaSO4 (s)
Which graph represents a plot of conductivity against volume of acid added?
- 22N.1.sl.TZ0.19: Equal volumes of 0.10 mol dm−3 weak acid and strong acid are titrated with 0.10 mol dm−3 NaOH...
- 22N.1.sl.TZ0.19: Equal volumes of 0.10 mol dm−3 weak acid and strong acid are titrated with 0.10 mol dm−3 NaOH...