Chemistry 5070 · O Level · Exothermic and endothermic reactions
Exothermic and endothermic reactions — practice question
If 1 mole of sodium hydroxide reacts with excess hydrochloric acid, 57.1 kJ of energy is given out.
$\text{NaOH} + \text{HCl} \rightarrow \text{NaCl} + \text{H}_2\text{O}$
(a)[2]
Calculate the heat energy released when 12.0 g of sodium hydroxide reacts with excess hydrochloric acid.
(b)[2]
Calculate the volume of $0.200\,\text{mol dm}^{-3}$ HCl that contains 2.19 g of HCl.
(c)[2]
Aqueous hydrochloric acid includes chloride ions. Describe a chemical test for chloride ions.
(d)[1]
Zinc oxide reacts with both hydrochloric acid and sodium hydroxide. Which word is used to describe this behaviour of zinc oxide?
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “NaOH moles = 0.30” …