TBR GChem Ch.3

[Synapsis]

---

Members do not see this ad.

This is question 44.

A question gives a table of compounds, their Ksp's and their molar solubilities. It asks which has the smallest percent error in the value of Ksp. The answer, according to the explanation in TBR, is the one with the greatest molar solubility, because the larger the molar solubility, the smaller the percent error. I don't remember reading this in the chapter (unless I missed something) and it wasn't in the passage. How might I have figured this out? Is it just a general rule?

 

[rfvbnmju]

I'm not sure if it was discussed by TBR but here's how I think of it.

For questions like this, the answer will be either extreme, the greatest or least molar soluble compound.

Lets say you have molar solubility of 1 (large) and .01 (small), if you have a .01 measurement error (this would introduce some % error), it would more greatly affect the .01 (small) than the 1(large) solubility.

Hope that helps.

 

[gettheleadout]

It's not in the chapter, it's just a general rule. Assuming you have systematic error in your measurements, larger values will be less affected percentage-wise.

 

[Synapsis]

Got this answered. Thanks for the help guys! It was something I overthought while rushing.