nCuO = 28/80=0.35 mol
CuO + H2 -to-> Cu + H2O
0.35__________0.35
mCu = 0.35*64=22.4 g < 24 g
=> CuO dư
Đặt :
nCuO phản ứng = x mol
CuO + H2 -to-> Cu + H2O
x_____________x____x
mCr = mCuO dư + mCu = 24
=> 28 - 80x + 64x = 24
=> x = 0.25
mH2O = 0.25*18 = 4.5 g
Ta có PT: CuO + H2 ---> Cu + H2O
mO trong CuO = 28 - 24=4(g)
nO trong CuO = \(\frac{4}{16}\)=0,25(mol)
Ta có: nO trong CuO = nO trong \(H_2O\) = n\(H_2O\) = 0,25(mol)
=> m\(H_2O\) = 0,15.18 = 4,5(g)
\(n_{CuO}\frac{28}{80}=0,35\left(mol\right)\)
PTHH: CuO + H2 --> Cu + H2O
0,35 -------> 0,35 -> 0,35 (mol)
=>\(m_{Cu}=0,35.64=22,4\left(g\right)\)
=> %H = \(\frac{22,4}{24}.100\%=\frac{280}{3}\%\)
=> \(m_{H_2O}=0,35.18.\frac{280}{3}\%=5,88\left(g\right)\)