Which of the equations corresponds to the exchange reaction? 1) H2 + Fe2O3 = 2Fe + 3H2O
| February 13, 2021 | education
Which of the equations corresponds to the exchange reaction? 1) H2 + Fe2O3 = 2Fe + 3H2O 2) CuCl2 + Zn = ZnCl2 + Cu 3) Na2О + СO2 = Na2CO3 4) 2KOH + H2S = K2S + 2H2O
1) H2 + Fe2O3 = 2Fe + 3H2O (substitution reaction);
2) CuCl2 + Zn = ZnCl2 + Cu (substitution reaction);
3) Na2O + CO2 = Na2CO3 (compound reaction);
4) 2KOH + H2S = K2S + 2H2O (exchange reaction).
The fourth reaction is suitable, hence the answer: 4) 2KOH + H2S = K2S + 2H2O
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