Question

What would happen if you passed the products of combustion of a hydrocarbon through lime water?

Answer 1

Answer:

You will obtain calcium carbonate $CaCO_{3}$

Explanation:

First, in the combustion of a hydrocarbon you obtain carbon dioxide $CO_{2}$ and water $H_{2}O$. We take methane $CH_{4}$ for example:

$CH_{4}$ + $2O_{2}$ ⇒ $CO_{2}$ +  $2H_{2}O$

And if you pass the products to the lime water, which here it refers to a solution of calcium hydroxide $Ca(OH)_{2}$, the following reaction will take place:

$Ca(OH)_{2}$ + $CO_{2}$ ⇒ $CaCO_{3}$ +  $H_{2}O$

So in the final you obtain a white precipitate, which is the calcium carbonate.