Tag: chemistry

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.
$SO _2 + NaOH \rightarrow NaHSO _3$
$SO _2 + 2NaOH \rightarrow  Na _2SO _3 + H _2O$

We can conclude that $NO _2$ is acidic in nature as it reacts with a base $(NaOH)$ to form salt and water.

The reaction between dinitrogen trioxide and $KOH$ gives $KNO _2$.
$N _2O _3 + 2KOH  \rightarrow 2KNO _2 + H _2O$

When NaOH reacts with $NO _2$, the products obtained are $NaNO _2$ and $NaNO _3$
$2NaOH + 2NO _2 \rightarrow NaNO _2 + NaNO _3 + H _2O$