n1 moli Zn Zn + 2HCl = ZnCl2 + H2↑
n2 moli ZnS ZnS + 2HCl = ZnCl2 + H2S↑
n1·100/(n1 +n2) = 60 10n1 = 6n1 + 6n2 4n1 = 6n2 n1 = 1,5n2
m amestec solid = 65n1 + 97n2 = 194,5n2
%Zn = 97,5n2·100/(194,5n2) = 50,128%
%ZnS = 97n2/(194,5n2) = 49,872%
b) n1 + n2 = 12,32/22,4 = 0,55moli 2,5n2 = 0,55 n2 = 0,22moli n1 = 0,33 moli
nHCl = 2n1 + 2n2 = 0,66 + 0,44 = 1,1moli mHCl = 40,15g c = 21% ⇒
⇒ ms =191,19 g