Will a precipitate form if 100ml of 1.0x10^-3 mol/L Pb(NO3)2 solution is added to 100ml of 2.0x10^-3 mol/L MgSO4 solution?

Question

anonymous · Answer

@Callisto can you help me?

callisto · Answer

Yes... PbSO4 is insoluble

callisto · Answer

$$Pb(NO_{3})_{2} (aq) + MgSO_{4} (aq) -> PbSO_{4}(s) + Mg^{2+}(aq) + 2NO_{3} ^{-}(aq)$$

mos1635 · Answer

if Ksp of PbSO4 is given we could have a more acurate investigation.....

jfraser · Answer

a ppt may or may not form, it depends on the concentrations. Ksp calculations will determine whether the combination of ions is concentrated enough to give a ppt.

callisto · Answer

I'm sorry!!! I haven't learnt anything about Ksp ... so I don't know that ppt may not form ... I'm sorry...

jfraser · Answer

@Callisto you are generally correct, a ppt will probably form because PbSO4 is insoluble, but if the concentrations are weak enough, there won't be a ppt

callisto · Answer

@JFraser Thank you for giving more information. Consider this case, would there be any ppt?

jfraser · Answer

give me a few minutes to work through the numbers, i have to go teach soon

callisto · Answer

Thank you!!!!

jfraser · Answer

in this case,a ppt will not form. the concentration of the combined ions is less than the maximum allowable by the KSP

callisto · Answer

Sorry again.. I know I have no right to ask, but can you show how you get the answer?