ZnS + 2HCl --> ZnCl2 + H2S↑
Cu(OH)2 + H2S --> CuS↓ + 2H2O
CuS + 2HCl --> CuCl2 + H2S↑
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ZnS + 2HCl --> ZnCl2 + H2S↑
Cu(OH)2 + H2S --> CuS↓ + 2H2O
CuS + 2HCl --> CuCl2 + H2S↑