Дано:
m(CH3CHO)общ= 55г
w(CH3CHO)= 40 %
m(CH3COOH)-?
Решение:
СH3COH+2Cu(OH)2=Cu2O+CH3COOH+2H2O
M(CH3CHO)= 12*2+16+4= 44г/моль
m(CH3CHO)= 40%*55г/100=22г
n(CH3CHO)= 22/44= 0.5 моль
n(CH3COOH)=n(CH3COH)=0.5 моль
m(CH3COOH)= 0.5 * ( 12*2+16*2+4)= 84* 0.5=42г
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Answers & Comments
Дано:
m(CH3CHO)общ= 55г
w(CH3CHO)= 40 %
m(CH3COOH)-?
Решение:
СH3COH+2Cu(OH)2=Cu2O+CH3COOH+2H2O
M(CH3CHO)= 12*2+16+4= 44г/моль
m(CH3CHO)= 40%*55г/100=22г
n(CH3CHO)= 22/44= 0.5 моль
n(CH3COOH)=n(CH3COH)=0.5 моль
m(CH3COOH)= 0.5 * ( 12*2+16*2+4)= 84* 0.5=42г