1. Ca + 2H2O = Ca(OH)2 + H2
2. Са(ОН)2 + 2НCl = СаCl2 + 2Н2О
3. СаCl2 + Na2CO3 = 2NaCl + CaCO3
4. CaCO3 + 2НNO3 = Ca(NO3)2 + CO2 + Н2О
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Answers & Comments
1. Ca + 2H2O = Ca(OH)2 + H2
2. Са(ОН)2 + 2НCl = СаCl2 + 2Н2О
3. СаCl2 + Na2CO3 = 2NaCl + CaCO3
4. CaCO3 + 2НNO3 = Ca(NO3)2 + CO2 + Н2О