Mình xin giải bài như thế này :
PTHH :
CuO+ H[SUB]2[/SUB]SO[SUB]4[/SUB] ------> CuSO[SUB]4[/SUB]+H[SUB]2[/SUB]O.
nCuO=0.02 mol
mH[SUB]2[/SUB]SO[SUB]4[/SUB] = 20*100/100 = 20g .
n[SUB]H[SUB]2[/SUB]SO[SUB]4[/SUB][/SUB]=20/98 =0.204 mol
ta có : 0.02/1 < 0.204/1
>>>>dd H[SUB]2[/SUB]SO[SUB]4[/SUB] dư , dư : 0.204-0.02=0.184 mol
mdd SPU : 1.6 + 100 =101.6g
m CuSO[SUB]4[/SUB]= 0.02 * 160=3.2g
m H[SUB]2[/SUB]SO[SUB]4[/SUB] dư : 0.184*98=18,032 g
C% dd CuSO[SUB]4[/SUB] = 3.2 *100 / 101.6 = 3.15%
C% H[SUB]2[/SUB]SO[SUB]4[/SUB] dư = 17.7% .
HẾT .