Question

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

Answer 1

You will obtain calcium carbonate
`CaCO_(3)`

Step-by-step 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.