Chemistry 5070/21 — May/June 2022

Cambridge O-Level · Theory · worked solutions for every part, with the mark scheme

questions

marks

minutes

Topics Stoichiometry · Chemical Reactions · Atoms, Elements and Compounds · Metals · Acids, Bases and Salts · Experimental Techniques and Chemical Analysis · +6 more

Q16MAcids, Bases and SaltsExperimental Techniques and Chemical AnalysisChemical ReactionsAtoms, Elements and CompoundsFree sample

Choose from the following compounds to answer the questions.

$\text{NH}_4\text{Cl}$
$\text{BaSO}_4$
$\text{KI}$
$\text{K}_2\text{SO}_3$
$\text{Mg(NO}_3)_2$
$\text{NaOCOCH}_3$
$\text{Na}_2\text{CO}_3$
$\text{Na}_3\text{PO}_4$
$\text{ZnSO}_4$

Each compound may be used once, more than once or not at all.

State which compound:

(a)

reacts with dilute nitric acid to form a gas that turns limewater milky

______

(b)

reacts with warm aqueous sodium hydroxide to form a gas that turns damp red litmus paper blue

______

(c)

reacts with dilute hydrochloric acid to give a gas that decolourises acidified potassium manganate(VII)

______

(d)

is prepared using a precipitation reaction

______

(e)

contains an anion with a charge of –3

______

(f)

is used to test for an oxidising agent.

______

The rest of this paper

8 more questions

Q2Atoms, Elements and Compounds · The Periodic Table · States of Matter · Metals · Stoichiometry10M
Q3Organic Chemistry7M
Q4Atoms, Elements and Compounds8M
Q5Chemical Reactions · Stoichiometry · Experimental Techniques and Chemical Analysis · Electrochemistry · Metals14M
Q6Chemistry of the Environment · Chemical Reactions · Chemical Energetics10M
Q7Metals · Atoms, Elements and Compounds · Electrochemistry · Stoichiometry10M
Q8Organic Chemistry · Stoichiometry10M
Q9Chemical Reactions · Acids, Bases and Salts · Stoichiometry · Chemistry of the Environment10M

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