CuO + H2SO4 → CuSO4 + H2O
\(n_{CuO}=\frac{8}{80}=0,1\left(mol\right)\)
Theo PT: \(n_{H_2SO_4}=n_{CuO}=0,1\left(mol\right)\)
\(\Rightarrow m_{H_2SO_4}=0,1\times98=9,8\left(g\right)\)
\(\Rightarrow m_{ddH_2SO_4}=\frac{9,8}{9,8\%}=100\left(g\right)\)
nCuO= 8/80=0.1 mol
CuO + H2SO4 --> CuSO4 + H2O
0.1_____0.1
mH2SO4= 0.1*98=9.8g
mddH2SO4= 9.8*100/9.8=100g
ta có : nCuO= 8/80=0,1 mol;
PTHH : CuO + H2SO4--> CuSO4 + H2O
Theo pt : nH2SO4 cần dùng = nCuO = 0,1 mol ;
--> mdd H2SO4 cần dùng = 0,1 * 98/9,8% =100(g)