n1 moli Zn + 2HCl = ZnCl2 + H2
n2 moli ZnS + 2HCl = ZnCl2 + H2S
nH2 + nH2S = n1 + n2 ⇒ n1 = 0,6(n1 + n2) 0,4n1 = 0,6n2 n1 = 1,5n2
m amestec solid = 65n1 + 97n2 = 194,5n2
% = 97,5n2·100/194,5n2 = 50,128% %ZnS = 9700n2/194,5n2 = 49,872%
V H2 = 0,6·12,32 = 7,392 l nH2 = 0,33 moli ⇒ n1HCl = 0,66moli
V H2S = 0,4·12,32 = 4,928 nH2S = 0,22 moli ⇒ n2HCl = 0,44moli
⇒ n total HCl = 1,1 moli m = 40,15g ms = 40,15·100/21 = 191,19g