Reaction equation: zn-zns – zncl2 – zn (no3) 2-zn (oh) 2-na 2 [zn (oh) 4]

1) Zn + S → ZnS (compound reaction);

2) ZnS + 2HCl → ZnCl2 + H2S (exchange reaction);

3) ZnCl2 + 2AgNO3 → Zn (NO3) 2 + 2AgCl ↓ (exchange reaction);

4) Zn (NO3) 2 + 2NaOH → Zn (OH) 2 ↓ + 2NaNO3 (exchange reaction);

5) Zn (OH) 2 ↓ + 2NaOH → Na2 [Zn (OH) 4] (compound reaction).



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