Question

what happens when carbon dioxide is passed through slaked lime with chemical equation

Answer 1

If CO2 is passed through slaked lime(calcium hydroxide Ca(OH)2). Reaction:::: CO2 + CA(OH)2----> CaCO3+ H2O. It gives out calcium carbonate (CaCO3) also called as marble/limestone. Hope this helps u.

Answer 2

This is one of the chemical tests for carbon dioxide. That is called as lime water test. When lime (CaO) reacts with water it forms slaked lime $\left(\mathrm{Ca}(\mathrm{OH})_{2}\right)$. When the carbon dioxide is passing  through the slaked lime solution, it turns milky when the calcium carbonate and calcium bicarbonate is formed.

The chemical reaction can be expressed as:  

$\mathrm{CaO}+\mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{Ca}(\mathrm{OH})_{2}$

$\mathrm{Ca}(\mathrm{OH})_{2}+\mathrm{CO}_{2} \rightarrow \mathrm{CaCO}_{3}+\mathrm{H}_{2} \mathrm{O}$

When calcium hydroxide is treated with carbon dioxide, the calcium carbonate and water is formed, then carbon dioxide is released.