Write the reaction equation: Na2CO3 → NaCl → Na → NaI → NaNO3 → Na2CrO4

1) Na2CO3 + 2HCl → 2NaCl + H2O + CO2;

2) 2NaCl → 2Na + Cl2;

3) 2Na + I2 → 2NaI;

4) 2NaI + 4HNO3(конц.) → I2 + 2NO+ 2H2O + 2NaNO3;

5) 3NaNO3 + 4NaOH + Cr2O3 → 2Na2CrO4 + 3NaNO2 + 2H2O.



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