Write the reaction equation: Ca- CaO- Ca (NO3) 2- Ca (OH) 2

When solving this chain, the chemical equations will look like this:

1) 2Ca + O2 2CaO

Calcium react with oxygen to produce calcium oxide. This reaction takes place at a temperature of over 300 ° C. Burning calcium in air.

2) CaO + 2 HNO3 → Ca (NO3) 2 + H2O

Calcium oxide react with nitric acid to produce calcium nitrate and water.

3) Ca (NO3) 2 + 2NaOH → Ca (OH) 2 + 2NaNO3

Calcium nitrate react with sodium hydroxide to produce calcium hydroxide and sodium nitrate. Sodium hydroxide – concentrated solution.