1. 2Na+2HCl = 2NaCl + H2
2. Na2O + 2HCl =H2O + 2NaCl (тут не совсем уверена)
3. NaOH +HCl = NaCl + H2O
4. Na2SO4 + HCl = NaCl + H2SO4
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Answers & Comments
1. 2Na+2HCl = 2NaCl + H2
2. Na2O + 2HCl =H2O + 2NaCl (тут не совсем уверена)
3. NaOH +HCl = NaCl + H2O
4. Na2SO4 + HCl = NaCl + H2SO4