DP Chemistry (first assessment 2025)

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Question 19N.1A.SL.TZ0.1

Date	November 2019	Marks available	[Maximum mark: 1]	Reference code	19N.1A.SL.TZ0.1
Level	SL	Paper	1A	Time zone	TZ0
Command term	Determine	Question number	1	Adapted from	N/A

1.

[Maximum mark: 1]

19N.1A.SL.TZ0.1

0.10 mol of hydrochloric acid is mixed with 0.10 mol of calcium carbonate.

2HCl (aq) + CaCO₃ (s) → CaCl₂ (aq) + H₂O (l) + CO₂ (g)

Which is correct?

[1]

Markscheme

C

Syllabus sections

Reactivity 2. How much, how fast and how far? » Reactivity 2.1—How much? The amount of chemical change » Reactivity 2.1.3—The limiting reactant determines the theoretical yield. Identify the limiting and excess reactants from given data.

Reactivity 2. How much, how fast and how far? » Reactivity 2.1—How much? The amount of chemical change » Reactivity 2.1.4—The percentage yield is calculated from the ratio of experimental yield to theoretical yield. Solve problems involving reacting quantities, limiting and excess reactants, theoretical, experimental and percentage yields.