https://hoc24.vn/hoi-dap/question/42486.html
PTHH: CuO + 2HCl -> CuCl2 + H2O(1)
-nCuO=8/80=0,1
a)-Theo (1): nHCl=2nCuO=2*0,1=0,2
=>V ddHCl=0,2/2=0,1(l)
b)PTHH: CuCl2 + 2KOH -> Cu(OH)2 + 2KCl(2)
-Theo (1): nCuCl2=nCuO=0,1
-Theo (2): nCu(OH)2=nCuCl2=0,1
=>x=0,1*98=9,8(g)
-Theo (2): nKOH=2nCuCl2=2*0,1=0,2
=>mKOH=0,2*56=11.2(g)
=>m ddKOH=(11,2*100)/25=44,8(g)