DP Chemistry (first assessment 2025)

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Reactivity 3. What are the mechanisms of chemical change? » Reactivity 3.1—Proton transfer reactions » Reactivity 3.1.6—Strong and weak acids and bases differ in the extent of ionization. Recognize that acid–base equilibria lie in the direction of the weaker conjugate. and are strong acids, and group 1 hydroxides are strong bases.

Reactivity 3.1.6—Strong and weak acids and bases differ in the extent of ionization. Recognize that acid–base equilibria lie in the direction of the weaker conjugate. and are strong acids, and group 1 hydroxides are strong bases.

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Directly related questions

22N.1A.SL.TZ0.24: Which are isomers of C5H12? A. I and II only B. I and III only C. II and III only D. I, II...
22N.1A.SL.TZ0.24: Which are isomers of C5H12? A. I and II only B. I and III only C. II and III only D. I, II...
22N.1A.SL.TZ0.25:
Which homologous series has the general formula C_nH_2nO (n > 2)?

A. Alcohols

B. Carboxylic acids

C. Ethers

D. Ketones
22N.1A.SL.TZ0.25:
Which homologous series has the general formula C_nH_2nO (n > 2)?

A. Alcohols

B. Carboxylic acids

C. Ethers

D. Ketones
22N.1A.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.1A.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.1A.SL.TZ0.20: Which species has the weakest conjugate base? A. HCl B. NH4+ C. HCO3− D. H2O
22N.1A.SL.TZ0.20: Which species has the weakest conjugate base? A. HCl B. NH4+ C. HCO3− D. H2O
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:
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:
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.
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.
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:
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.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,...
20N.1A.SL.TZ0.20:
Which of these acids has the weakest conjugate base?

A.   $HCl$

B.   ${CH}_{3} COOH$

C.   ${NH}_{4} Cl$

D.   $C_{6} H_{5} COOH$
20N.1A.SL.TZ0.20:
Which of these acids has the weakest conjugate base?

A.   $HCl$

B.   ${CH}_{3} COOH$

C.   ${NH}_{4} Cl$

D.   $C_{6} H_{5} COOH$
20N.1A.SL.TZ0.20:
Which of these acids has the weakest conjugate base?

A.   $HCl$

B.   ${CH}_{3} COOH$

C.   ${NH}_{4} Cl$

D.   $C_{6} H_{5} COOH$
20N.1A.SL.TZ0.20:
Which of these acids has the weakest conjugate base?

A.   $HCl$

B.   ${CH}_{3} COOH$

C.   ${NH}_{4} Cl$

D.   $C_{6} H_{5} COOH$
20N.1B.SL.TZ0.2g: Suggest a risk of using sulfuric acid as the catalyst.
20N.1B.SL.TZ0.g: Suggest a risk of using sulfuric acid as the catalyst.
20N.1B.SL.TZ0.2g: Suggest a risk of using sulfuric acid as the catalyst.
20N.1B.SL.TZ0.g: Suggest a risk of using sulfuric acid as the catalyst.
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.
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.
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.
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.
22M.1A.SL.TZ1.26: Which statement explains the Lewis acid–base nature of the chloride ion in this reaction? C2H5+...
22M.1A.SL.TZ1.26: Which statement explains the Lewis acid–base nature of the chloride ion in this reaction? C2H5+...
22M.1A.SL.TZ1.26: Which statement explains the Lewis acid–base nature of the chloride ion in this reaction? C2H5+...
22M.1A.SL.TZ1.26: Which statement explains the Lewis acid–base nature of the chloride ion in this reaction? C2H5+...
22M.1A.SL.TZ1.20: Which 0.01 mol dm–3 aqueous solution has the highest pH? A. HCl B. H2SO4 C. NaOH D. NH3
22M.1A.SL.TZ1.20: Which 0.01 mol dm–3 aqueous solution has the highest pH? A. HCl B. H2SO4 C. NaOH D. NH3
22M.1A.SL.TZ1.20: Which 0.01 mol dm–3 aqueous solution has the highest pH? A. HCl B. H2SO4 C. NaOH D. NH3
22M.1A.SL.TZ1.20: Which 0.01 mol dm–3 aqueous solution has the highest pH? A. HCl B. H2SO4 C. NaOH D. NH3
22M.1A.SL.TZ2.19:
Which of the 0.001 mol dm⁻³ solutions is most likely to have a pH of 11.3?

A. Ca(OH)₂(aq)

B. H₃PO₄(aq)

C. NaOH (aq)

D. NH₄OH (aq)
22M.1A.SL.TZ2.19:
Which of the 0.001 mol dm⁻³ solutions is most likely to have a pH of 11.3?

A. Ca(OH)₂(aq)

B. H₃PO₄(aq)

C. NaOH (aq)

D. NH₄OH (aq)
22M.1A.SL.TZ2.19:
Which of the 0.001 mol dm⁻³ solutions is most likely to have a pH of 11.3?

A. Ca(OH)₂(aq)

B. H₃PO₄(aq)

C. NaOH (aq)

D. NH₄OH (aq)
22M.1A.SL.TZ2.19:
Which of the 0.001 mol dm⁻³ solutions is most likely to have a pH of 11.3?

A. Ca(OH)₂(aq)

B. H₃PO₄(aq)

C. NaOH (aq)

D. NH₄OH (aq)

Sub sections and their related questions

None