With which of the listed substances – water, calcium chloride (solution), zinc, hydrochloric acid – will sodium carbonate in an aqueous solution react? Write down the ion-molecular reaction equations.
Sodium carbonate will react with calcium chloride to form CaCO3 precipitate:
Na2CO3 + CaCl2 = CaCO3 + 2NaCl
2Na (+) + CO3 (2-) + Ca (2+) + 2Cl (-) = CaCO3 + 2Na (+) + 2Cl (-)
Ca (2+) + CO3 (2-) = CaCO3
Also sodium carbonate will react with hydrochloric acid to form gas and water CO2, H2O:
Na2CO3 + 2HCl = 2NaCl + H2O + CO2
2Na (+) + CO3 (2-) + 2H (+) + 2Cl (-) = 2Na (+) + 2Cl (-) + H2O + CO2
2H (+) + CO3 (2-) = H2O + CO2
Does not react with zinc (a weaker metal than sodium) and water (solvent)
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