I'm not quite finished with the numerator though at this point.

I have to add something to the Ksp expression to

accommodate for the 3 that's the coefficient, to show that there

were 3 times as many ammonium cations formed as there were

in the previous examples that had the sodium and the silver.

So what I'm going to do then, and this is

the way that the convention was developed and it's a human

construct, is that that 3 coefficient

becomes an exponent here in the expression.

So if it were to be a 2, then this would be ammonium ion concentration squared.

But since it's a 3, it's the ammonium ion concentration cubed.

And that's just how people decided to do it.

These Ksp values are a human construct.

I'm going to divide all that by the

concentration of ammonium phosphate.