xsilicax
幼苗
共回答了12个问题采纳率:100% 举报
①Ca(HCO3)2+NaOH(过,少)
NaOH少量:
Ca(HCO3)2 + NaOH == CaCO3↓ + NaHCO3 + H2O
Ca2+ + HCO3- + OH- == CaCO3↓ + H2O
NaOH过量:
Ca(HCO3)2 + 2NaOH == CaCO3↓ + Na2CO3 + 2H2O
Ca2+ + 2HCO3- + 2OH- == CaCO3↓ + CO3^2- + 2H2O
②NaHCO3+Ca(OH)2 (过,少)
Ca(OH)2少量:
2NaHCO3 + Ca(OH)2 == CaCO3↓ + Na2CO3 + 2H2O
2HCO3- + Ca2+ + 2OH- == CaCO3↓ + CO3^2- + 2H2O
Ca(OH)2过量:
NaHCO3 + Ca(OH)2 == CaCO3↓ + NaOH + H2O
HCO3- + Ca2+ + OH- == CaCO3↓ + H2O
1年前
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