Đáp án đúng: B
3,2 g và 1,12 lit.
Dung địch đem điện phân có
$\displaystyle \left\{ \begin{array}{l}\text{C}{{\text{u}}^{\text{2+}}}\,{}^{\text{1}}\!\!\diagup\!\!{}_{\text{15}}\;\,\text{mol}\\\text{SO}_{\text{4}}^{\text{2-}}\,{}^{\text{1}}\!\!\diagup\!\!{}_{\text{15}}\;\,\text{mol}\\{{\text{H}}^{\text{+}}}\,\text{0,06}\,\text{mol}\\\text{C}{{\text{l}}^{\text{-}}}\,\text{0,06}\,\text{mol}\end{array} \right.$
${{\text{n}}_{\text{e}}}\text{=}\frac{\text{It}}{\text{F}}\approx \text{0,1}\,\text{mol}$
Katot (-)
Anot (+)
$\begin{array}{l}\text{C}{{\text{u}}^{\text{2+}}}\text{+}\,\,\,\,\text{2e}\xrightarrow{{}}\text{Cu}\\\text{0,05}\leftarrow \text{0,1}\end{array}$
$\begin{array}{l}\text{2C}{{\text{l}}^{\text{-}}}\xrightarrow{{}}\text{C}{{\text{l}}_{\text{2}}}\text{+2e}\\\text{0,05}\,\,\,\,\xleftarrow{{}}\,\,\,\,\,\,\,\,\text{0,1}\end{array}$
$\Rightarrow {{\text{m}}_{\text{Cu}}}\text{=3,2}\,\text{gam;}\,{{\text{V}}_{\text{C}{{\text{l}}_{\text{2}}}}}\text{=1,12}\,\text{lit}$
