Tag: reactions of acids and bases

The addition of water to a non-metal oxide results in a compound that consists of a non-metal atom surrounded by oxo ($=O$) and hydroxyl ($-OH$) groups. 

When ferrous oxide reacts with nitric acid, the products obtained are ferric nitrate, $NO$ and water.
$3FeO + 10HNO _3 \rightarrow 3Fe(NO _3) _3 + NO + 5H _2O$

Wen $CuO$ reacts with nitric acid, $CuNO _3$ and water are obtained.
$CuO + 2HNO _3 \rightarrow Cu(NO _3) _2 + H _2O$

The reaction of $CuO$ with sulphuric acid gives copper sulphate.
$\displaystyle CuO + H _2SO _4 \rightarrow CuSO _4 + H _2O$

Carbon dioxide reacts with calcium hydroxide to form calcium carbonate and water.
$\displaystyle Ca(OH) _2 + CO _2 \rightarrow CaCO _3 + H _2O$

When few drops of dil. $HCl$ is added to a small amount of red copper oxide, the colour of solution becomes blue due to the formation of chloride of copper $CuCl _2$.
$\displaystyle CuO + 2HCl \rightarrow CuCl _2 + H _2O$

The products of the reaction between $NaOH$ and sulphur dioxide are either $NaHSO _3$ or $Na _2SO _3$
$SO _2 + NaOH \rightarrow NaHSO _3$
$SO _2 + 2NaOH \rightarrow  Na _2SO _3 + H _2O$

In the given reaction calcium hydroxide which is a base reacts with carbon dioxide to give salt and water. So, carbon dioxide will be acidic in nature because acid and base reacts to give salt and water. nature.

When $MgO$ reacts with $HCl$, the products obtained are $MgCl _2$ and water.

We can conclude that sulphr dioxide is acidic in nature as it reacts with a base $(NaOH)$ to form salt and water.
$SO _2 + NaOH \rightarrow NaHSO _3$
$SO _2 + 2NaOH \rightarrow  Na _2SO _3 + H _2O$