Soluble N Insoluble

[ScratchMan]

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I have a question about the solubility in solution. Based on Chad's video,
1. All group I metal, NO3^-1, NH4^+1 are soluble.
2. Most Ag^+, Pb^2+, Hg2^2+, Ba^2+ are insoluble.

Thus, I picked up NaCl(aq) + Ba(NO3)2(aq) to produce a single precipiate.
But, answer is Li2S(aq) + FeBr3(aq).

Please address me why the answer is so.

Thanks.

 

[Ibraiz]

I have a question about the solubility in solution. Based on Chad's video,
1. All group I metal, NO3^-1, NH4^+1 are soluble.
2. Most Ag^+, Pb^2+, Hg2^2+, Ba^2+ are insoluble.

Thus, I picked up NaCl(aq) + Ba(NO3)2(aq) to produce a single precipiate.
But, answer is Li2S(aq) + FeBr3(aq).

Please address me why the answer is so.

Thanks.

b u m p

 

[ScratchMan]

it is also not applicable for Chad's explanation for solubility. Chad mentioned that Pb^+2 will be insoluble but the answer is not.

I am not confident in his solubility rule....

 

[UndergradGuy7]

Chad made generalizations so that you do not have to memorize the whole solubility table. If you want you can memorize the entire solubility table (I plan on it).

 

[herkulease]

On the 2nd one, notice how the question says

which set contains A salt that is soluble.

It does not say that all of them are soluble.

The soluble salt in that answer is the one that contained ammonium.

as for the other one. there's really no explanation other than to learn the solubility rules.

 

[sfoksn]

Halogens are insoluble only with Hg, Ag, Pb... so BaCl and Na(NO3) would both be soluble...

On the other hand, sulfides are often insoluble, especially with transition metals.

 

[ScratchMan]

Could you figure out following which one is soluble or insoluble? 😳
Thanks.

CdCO3 -->

PbSO4 --> insoluble (Pb^2+ insoluble)

(NH4)2CO3 --> soluble (NH4 soluble)

ZnS --> insoluble (transition metal + sulfide: it is based on sfoksn's statement)

Hg2Br2 --> insoluble (Hg2^+2 insoluble)

Ni(OH)2 -->

Cr2S3 --> insoluble (transition metal + sulfide: it is based on sfoksn's statement)

BaCrO4 --> insoluble (Ba^2+ insoluble)

AgCl --> insoluble (Ag^+ insoluble)

Fe(OH)3 -->

Ca3(PO4)2 -->

ZnO -->

ZnCO3 -->

 

[herkulease]

read this and apply it yourself.

that way you'll remember it better.

http://student.ccbcmd.edu/~cyau1/SolubilityRules.htm