2) dil. H2So4 + BaCl = ?
3)dil.H2SO4 +Zn(NO3)2 = ?
4)precipitation reaction 既出現條件係咩 ????????
唔該晒~~~~~~~~~~~~~~~~~~~~~~~~
更新1:
補充一問~~~~~~~~~1) 2) 3) 分別係邊類化學反應
CHEM化學equation問題(簡易拎20分)
2008-04-14 11:21 pm
1) HCl + Pb(NO3)2 = ?
2) dil. H2So4 + BaCl = ?
3)dil.H2SO4 +Zn(NO3)2 = ?
4)precipitation reaction 既出現條件係咩 ????????
唔該晒~~~~~~~~~~~~~~~~~~~~~~~~
2) dil. H2So4 + BaCl = ?
3)dil.H2SO4 +Zn(NO3)2 = ?
4)precipitation reaction 既出現條件係咩 ????????
唔該晒~~~~~~~~~~~~~~~~~~~~~~~~
回答 (2)
2008-04-14 11:46 pm
✔ 最佳答案
1)2HCl + Pb(NO3)2 →PbCl2+2HNO3* PbCl2 is insoluble in cold water BUT soluble in hot water
2) dil. H2SO4 + BaCl2→BaSO4+2HCl
*BaSO4 is insoluble in acids
3)dil.H2SO4 +Zn(NO3)2→ZnSO4+2HNO3
4)insoluble salt
2008-04-15 8:36 am
1 2HCl + Pb(NO3)2 --> PbCl2+2HNO3
2 dil. H2SO4 + BaCl2 --> BaSO4+2HCl
3 dil.H2SO4 +Zn(NO3)2 --> ZnSO4+2HNO3
4 the formation of insoluble salt from the reactants
2 dil. H2SO4 + BaCl2 --> BaSO4+2HCl
3 dil.H2SO4 +Zn(NO3)2 --> ZnSO4+2HNO3
4 the formation of insoluble salt from the reactants
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