[cvc121]

Hi,

Here is the question I am having difficulty with:
Given the salts CuI₂ and MgF₂, identify the type of solution (acidic, basic, or neutral).

First of all, I identified the parent acids and parent bases.
CuI₂: Parent Acid - HI (STRONG)  Parent Base - Cu(OH)₂ (WEAK)
MgF₂: Parent Acid - HF (WEAK)  Parent Base - Mg(OH)₂ (WEAK)

Are both parent bases weak?

Hence, for CuI₂, wouldn't the solution be acidic? The answer in my booklet says the solution would be neutral!?!?!?

For MgF₂, how would you determine if the type of solution is acidic, basic, or neutral since both the parent acid and parent base are weak? The answer in my booklet says that Mg(OH)₂ is a strong base (BUT ISN'T IT A WEAK BASE!?!?) so therefore the type of solution is basic.

Really confused.
All help is very much appreciated!

[Hunter2]

CuI₂ is not existing, it decompose immidiatly to CuI and I₂. If it would existing the solution would be acidic. The magnesiumflouride has bad soloubility 0.13 g/l. It will be slight alcaline.