Question

1. Carbon reacts with oxygen gas to form carbon dioxide
2. Hydrochloric acid reacts with potassium to give hydrogen gas and potassium
chloride
3. Sulphuric acid reacts with sodium carbonate to produce sodium sulphate,
carbon dioxide and water
4. Calcium carbonate reacts with dilute hydrochloric acid to form calcium
chloride, carbon dioxide and water.
5. Dilute hydrochloric acid reacts with sodium carbonate to form sodium chloride,
carbon dioxide and water.

Answer 1

Answer:

c + O2 ----CO2

2hcl + 2k -----2kcl + h2

h2so4 + na2co3 --- na2so4 + CO2 + h2o

caco3 + hcl--- cacl2 +CO2 + h2o

hcl + na2co3 --- nacl + H20 + co2