$1.$An aqueous solution contains $0\mathrm{.}223M$ ascorbic acid $(H_2{C}_6{H}_6{O}_6)$ and $0\mathrm{.}138M$ hydroiodic acid,

Calculate the ascorbate $(C_6{H}_6{O}_6^{2-})$ ion concentration in this solution.

$[$

$2.$

An aqueous solution contains $0\mathrm{.}143M$ hydrosulfuric acid and $0\mathrm{.}178M$ hydrobromic acid.

Calculate the sulfide ion concentration in this solution.

$[s2-]$

$mo\frac{l}{L}.$

$mo\frac{l}{L}.$

$3.$

An aqueous solution contains $0\mathrm{.}103M$ carbonic acid and $0\mathrm{.}198M$ hydrobromic acid.

Calculate the carbonate lon concentration in this solution.

$[C{O}_3^{2-}]=$

$mo\frac{l}{L}.$