a)CuO +H2SO4--->CuSO4+H2O
b) Ta có
n\(_{CuO}=\frac{2,4}{80}=0,03\left(mol\right)\)
m\(_{H2SO4}=\)\(\frac{100.29,4}{100}=29,4\left(g\right)\)
n\(_{H2SO4}=\frac{29,2}{98}=0,298\left(mol\right)\)
=> H2SO4 dư
Theo pthh
n\(_{H2SO4}=n_{CuO}=0,03\left(mol\right)\)
m\(_{H2SO4}=0,03.98=2,94\left(g\right)\)
c) n\(_{H2SO4}=0,298-0,03=0,268\left(mol\right)\)
C%H2SO4 =\(\frac{0,268.98}{100+2,4}.100\%=25,65\%\)
n\(_{CuSO4}=n_{CuO}=0,03\left(mol\right)\)
C%=\(\frac{0,03.160}{104,2}.100\%=4,6\%\)