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Answered 3 days After May 25, 2021

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Anuj answered on May 28 2021

150 Votes

Precipitation reactions
C. If possible, write dissociation equations for the six compounds shown in the photograph. Otherwise write “no dissociation”.
1. NiCl2 (aq)        H2O        Ni+2 (aq)    +    2 Cl- (aq)
2. KMnO4 (aq)        H2O        K+ (aq)        +    MnO4- (aq)
3. CuSO4 (aq)        H2O        Cu+2 (aq)    +    2 SO4- (aq)
4. Pb(NO3)2 (aq)        H2O        Pb+2 (aq)    +    2 NO3- (aq)
5. AgCl (aq)        H2O        No dissociation
In the information provided, AgCl is insoluble in water. So there will be no dissociation. However, if the volume of water is increased or amount of AgCl is decreased, we can make AgCl partially soluble in water. In that case the dissociation equation can we written as:
AgCl (aq)        H2O        Ag+ (aq)    +    Cl- (aq)
6. CdS (aq)        H2O        No dissociation
Again, in the information provided, CdS is insoluble in water. So there will be no dissociation. However, if the volume of water is increased or amount of CdS is decreased, we can make CdS partially soluble in water. In that case the dissociation equation can we written as:
CdS...

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