Reversibility and dynamic equilibria
3 marks · EasyThe thermal decomposition of calcium carbonate is shown below:
Identify the symbol in the equation that shows the reaction is reversible.
Write the name of the product formed as a gas in this reaction.
Rewrite the equation to represent this reaction as a reversible reaction.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
(a) ⇌
(b) Carbon dioxide · must show CO2
(c) \ce{CaCO3(s) \rightleftharpoons CaO(s) + CO2(g)} · must show ⇌, all correct species
Show mark scheme and worked solution
Marking points
B1 (a) · 1 mark · Identifies the reversible reaction symbol (⇌).
B1 (b) · 1 mark · States 'carbon dioxide' or gives correct formula ('CO2').
B1 (c) · 1 mark · Writes the equation with a reversible arrow (⇌) and correct species.
Worked solution
a) The reversible reaction is shown by the symbol '⇌'.
b) The gas formed is carbon dioxide (CO2).