a) NiCl2+MgSO3--->NiSO3↓+MgCl2
Ni2+ +2Cl- +Mg2+ +SO3 2- --->NiSO3↓ +Mg2+ +2Cl-
Ni2+ +SO3 2- --->NiSO3↓
b) 2K3PO4+3Sr(OH)2--->Sr3(PO4)2↓+6KOH
6K+ +2PO4 3- +3Sr2+ +6OH- --->Sr3(PO4)2↓ +6K+ +6OH-
2PO4 3- +3Sr2+ --->Sr3(PO4)2↓
c) 2BiCl3+3H2S--->Bi2S3↓+6HCl
2Bi3+ +6Cl- +6H+ +3S2- --->Bi2S3↓ +6H+ +6Cl-
2Bi3+ +3S2- --->Bi2S3↓
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a) NiCl2+MgSO3--->NiSO3↓+MgCl2
Ni2+ +2Cl- +Mg2+ +SO3 2- --->NiSO3↓ +Mg2+ +2Cl-
Ni2+ +SO3 2- --->NiSO3↓
b) 2K3PO4+3Sr(OH)2--->Sr3(PO4)2↓+6KOH
6K+ +2PO4 3- +3Sr2+ +6OH- --->Sr3(PO4)2↓ +6K+ +6OH-
2PO4 3- +3Sr2+ --->Sr3(PO4)2↓
c) 2BiCl3+3H2S--->Bi2S3↓+6HCl
2Bi3+ +6Cl- +6H+ +3S2- --->Bi2S3↓ +6H+ +6Cl-
2Bi3+ +3S2- --->Bi2S3↓