A student examines how large chunks of copper(II) carbonate react with dilute hydrochloric acid. The hydrochloric acid is present in excess.
$\text{CuCO}_3 + 2\text{HCl} \rightarrow \text{CuCl}_2 + \text{CO}_2 + \text{H}_2\text{O}$
The reaction rate is determined by tracking the mass of the reaction mixture as time passes. The outcomes are displayed on the graph.
(a)[1]
Deduce what the mass of the reaction mixture is at 30 s.
(b)[2]
Draw a line on the grid to illustrate how the mass of the reaction mixture changes as time increases.
(c)[2]
Describe the effect each of the following has on the rate of reaction of copper(II) carbonate with dilute hydrochloric acid.
• The reaction takes place in the presence of a catalyst.
• The reaction takes place with a lower concentration of hydrochloric acid.
(d)[1]
Calculate the volume of carbon dioxide gas produced when 0.50 g of copper(II) carbonate is used.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “180.42 g” …