唔明 dilute HNO3 同 CaCO3 react 既 equation 點解係
CO3(2-) + 2H+ --> CO2 + H2O
呢個係咪redox ? 如是, 請解釋.
CaCO3唔係reducing agent 吧?佢明明insoluble in water, 點解會有reaction?
Action between HNO3 & CaCO3
2008-08-15 3:24 am
回答 (2)
2008-08-15 4:16 am
✔ 最佳答案
呢個不是redox,你計一計,所有C的oxidation number都是+4,O的O.N都是-2,H的O.N都是+1,所以不是REDOX,這是acid和carbonate的反應
2008-08-15 4:16 am
2 HNO3 + CaCO3 → Ca(NO3)2 + CO2 + H2O
NO3- & Ca2+ are both spectator ions
ionic equation:
2H+ + CO3 2- → CO2 + H2O
no change in oxidation number → not a redox reaction
reactants can react no matter they are in the same phase
NO3- & Ca2+ are both spectator ions
ionic equation:
2H+ + CO3 2- → CO2 + H2O
no change in oxidation number → not a redox reaction
reactants can react no matter they are in the same phase
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