7.1 The diagram shows an experiment in which hydrochloric acid is added to a calcium salt. The gas carbon dioxide is given off,
Use the information to work out which calcium salt is being used,
How would you test the gas to check it is carbon dioxide? Remember to ? include the change you would expect to see.
Name the salt that is produced in this reaction.
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Answer:
2HCl + CaCo3 ---> CaCl2 + H2O + Co2
Explanation:
Carbon dioxide reacts with calcium hydroxide solution to produce a white precipitate of calcium carbonate. Limewater is a solution of calcium hydroxide. If carbon dioxide is bubbled through limewater, the limewater turns milky or cloudy white.
so when it turns into milky or cloudy white water you can say that Co2 is produced in the reaction
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