Viết pthh thể hiện dãy biến hóa sau
Na–>Na2O–>NaOH->>Na2CO3—>NaCl–>NaNO3
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Đáp án:
1. 4Na +O2 → 2Na2O
2.Na2O + H2O → 2NaOH
3.2NaOH +CO2 → Na2CO3 + H2O
4.Na2CO3 +2HCl → 2NaCl +H2O +CO2
5.AgNO3 + NaCl → AgCl + NaNO3