1. CuCl2+2NaOH=Cu (OH) 2 (осадок) + NaCl
n (NaOH) = m/M=4/23+16+1=0.1 моль
n (Cu (OH) 2) = n (NaOH) / 2=0.1/2=0.05 моль
m (NaOH) - n*M=0.05 * (23+16+1) = 2 г
2. Zn+2HCl=ZnCl2+H2 (газ)
n (Zn) = m/M=13/65=0.2 моль
n (H2) = n (Zn) = 0.2 моль
v (H2) = n/Vm=0.2-22.4=4.48 л
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Answers & Comments
1. CuCl2+2NaOH=Cu (OH) 2 (осадок) + NaCl
n (NaOH) = m/M=4/23+16+1=0.1 моль
n (Cu (OH) 2) = n (NaOH) / 2=0.1/2=0.05 моль
m (NaOH) - n*M=0.05 * (23+16+1) = 2 г
2. Zn+2HCl=ZnCl2+H2 (газ)
n (Zn) = m/M=13/65=0.2 моль
n (H2) = n (Zn) = 0.2 моль
v (H2) = n/Vm=0.2-22.4=4.48 л