Em tham khảo nha:
\(\begin{array}{l}
4)\\
{n_{CuS{O_4}.2{H_2}O}} = \dfrac{{25}}{{196}} = 0,128\,mol\\
{n_{CuS{O_4}}} = {n_{CuS{O_4}.2{H_2}O}} = 0,128\,mol\\
{C_M}CuS{O_4} = \dfrac{{0,128}}{{0,2}} = 0,64M\\
5)\\
{n_{CuS{O_4}.2{H_2}O}} = \dfrac{{25}}{{196}} = 0,128\,mol\\
{n_{CuS{O_4}}} = {n_{CuS{O_4}.2{H_2}O}} = 0,128\,mol\\
{C_\% }CuS{O_4} = \dfrac{{0,128 \times 160}}{{200}} \times 100\% = 10,24\%
\end{array}\)
