TBR solubility chapter?? :confused:

[SaCkO]

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Hello everyone, i am studying for a retake using TBR and i am really confused with how the material is being presented in The general chemistry solubility chapter.
They keep talking about molar solubility and then mix it up with Ksp.
plus they do not go thoroughly in the explanations for problems and they ask you to ignore some values without explaining why
This is really confusing me , is there any other resources that any one found helpful to fully understand this topic.
😕

 

[Freeinfinity]

basically molar solubility is what is used to compare solubility between two solutes. this is because the solubility product Ksp doesn't always have the same units between two solutes depending on how many ions per mole each one dissociates to. the "ignoring" part that u mentioned is basically when u can view the change to reach equilibrium as negligible because the current situation is already pretty close to equilibrium. keep reading it and practicing the problems. solubility is important (i found that out the hard way while practicing with a few aamc fls)

 

[MedPR]

Hello everyone, i am studying for a retake using TBR and i am really confused with how the material is being presented in The general chemistry solubility chapter.
They keep talking about molar solubility and then mix it up with Ksp.
plus they do not go thoroughly in the explanations for problems and they ask you to ignore some values without explaining why
This is really confusing me , is there any other resources that any one found helpful to fully understand this topic.
😕

They explain what Ksp is and what molar solubility is. They also have a huge table of when and when you cannot ignore the x value. Typically you can ignore the x value if it is not within 10^2 (or 10^-2) of the Ksp, or at least that's what I learned in my general chem class.

I guess you could try TPR or EK. Solubility was a pretty blaring weak point for me until I read TBR's chapter on it. Now I feel really good about it.

 

[SaCkO]

Thanks for your replies, i have gone through the solubility part in TBR and it is a little clearer, however i still don't understand why they would call it molar solubility and not just concentration.
TPR did not go in detail about molar solubility they used the same method is calculating Pka and PH

 

[MedPR]

Thanks for your replies, i have gone through the solubility part in TBR and it is a little clearer, however i still don't understand why they would call it molar solubility and not just concentration.
TPR did not go in detail about molar solubility they used the same method is calculating Pka and PH

I guess they could've called it concentration, but I think it's more clear when they use "molar solubility" so you know exactly what they are talking about. As I'm sure you figured out, molar solubility is just the number of moles of solute that can dissolve/dissociate in solution before it becomes saturated.

I'm not sure what you mean about pka and ph though...

The concept behind Ksp is the same as the concept behind Ka.. but beyond that I'm not sure how they are related.

 

[SaCkO]

I meant when they use Ka like Ksp to get conentration (molar solubility) of ions like H+ and then they can get PH, i just found out its the same concept.
I think you and I have the same study material, Which schedule are you following?

 

[MedPR]

I meant when they use Ka like Ksp to get conentration (molar solubility) of ions like H+ and then they can get PH, i just found out its the same concept.
I think you and I have the same study material, Which schedule are you following?

I'm doing SN2ed's schedule as far as when and what I am reading, but I'm doing the passages according to TBR's schedule. So what TBR calls phase 1 is what I'm doing as SN2ed calls "first 1/3." So basically I'm doing SN2ed's schedule, but doing the passages in a different order.