(a)[3]
Write the equation for the reaction in step 1, and add state symbols.
(b)[1]
Explain why excess zinc powder is added in step 1.
(c)[1]
Suggest how unreacted zinc powder is removed in step 2.
(d)[2]
Step 3 produces a saturated solution. Suggest what the term saturated solution means.
(e)[1]
Explain why crystals form as the solution cools in step 4.
(f)[2]
Name two zinc compounds that react with dilute hydrochloric acid to produce zinc chloride.
(g)[1]
If excess calcium metal is used instead of excess zinc powder in step 1, pure calcium chloride crystals do not form. Explain why.
(h(i))[1]
Circle the type of reaction that occurs: decomposition, neutralisation, precipitation, reduction.
(h(ii))[5]
Calculate the concentration of the aqueous sodium hydroxide in $\text{g dm}^{-3}$ by following these steps.