a)PTHH: CuO +H2 →Cu + H2O↑
b) nH2=0,2:2=0,1(mol)
nCuO=12÷80=0,15(mol)
PTHH: CuO + H2 → Cu + H2O↑
Theo pt ta có: nH2=nCuO=0,1(mol)
→ CuO dư
nCuO dư là: 0,15-0,1=0,05(mol)
→mCuO dư là: 0,05×80=4(g)
\(n_{H2}=\dfrac{0,2}{2}=0,1\left(mol\right)\)
\(n_{CuO}=\dfrac{12}{80}=0,15\left(mol\right)\)
PTHH:
CuO + H2 -to-> Cu + H2O
B.đầu: 0,15__0,1______0____0
P.ứng: 0,1__0,15_____0,1___0,1
S.P.ứng: 0,05__0_______0,1___0,1 (mol)
Chất còn dư là CuO.
mCuO tham gia p.ứng là: 0,1.80 = 8(gam)
mCuO(dư) = 12 - 8 = 4(gam)
a,Ta co pthh
H2 + CuO \(\rightarrow\)Cu + H2O
b,Theo de bai ta co
nH2=\(\dfrac{0,2}{2}=0,1mol\)
nCuO=\(\dfrac{12}{0}=0,15mol\)
Theo pthh ta co
nH2=\(\dfrac{0,1}{1}mol< nCuO=\dfrac{0,15}{1}mol\)
\(\Rightarrow\) CuO du
Theo pthh
nCuO=nH2=0,1mol
\(\Rightarrow\) khoi luong CuO da tham gia phan ung la
mCuO=0,1.80=8 g
Khoi luong con thua sau phan ung la
mCuO=12-8=4 g