Describe the colour change when excess acid is added to methyl orange in alkaline solution. from ................. to .................
Complete the word equation for the reaction of calcium carbonate with hydrochloric acid. hydrochloric acid + calcium carbonate → ................. + ................. + water
Calcium carbonate is used to make lime (calcium oxide). State one further use of calcium carbonate.
The decomposition of calcium carbonate is endothermic. State what is meant by endothermic.
The energy level diagram for the decomposition of calcium carbonate is shown. Explain how the energy level diagram indicates that this reaction is endothermic.
When 0.50 g of calcium carbonate decomposes, 120 cm$^3$ of carbon dioxide gas is made. Calculate the volume of carbon dioxide gas formed when 0.10 g of calcium carbonate is used.