And this will give me s.

And s = 4.98 times 10 to the -11.

So the silver makes a big impact.

On the Ksp, on the solubility, sorry, it doesn't change the Ksp at all,

has a big impact on the molar solubility, much more so than in part b.

Part b the molar solubility just dropped down ever so slightly.

It went from what it was in pure water, which was 6.5 times 10 to the -5,

and this became 1.0 times 10 to the -5, so it dropped a little bit.

Because of this square term, having some silver concentration

already present in solution really effected the molar solubility,

and this is way lower than what it is in pure water.

Now let's check our assumption, was it a valid assumption?

Let's look right here.

If we double s, okay, so that's going to be about,

let's say, 1 times 10 to the-10.

That's when you double this number.

We double it, it's going to be way too small to even think about when

you add it there to change this number of 0.15, it's still definitely 0.15.

So that was a very good assumption for that part of the problem.