Did you also get around 12 grms?
What's the date of test
Here ksp is given for CaSO4 na?
Nvm found it 20.4 is correct
How had you done this one?
I solved the quadratic
But after that idk how to proceed exactly it's not matching
Wait a min let me try it again and confirm
It's correct I had done calculation mistake.
Almost all of Ca will precipitate is 0.03
So mass of precipitate 0.03*5 * 136=20.4g
Also since 1/ksp is very big the backward reaction will almost goto completion and then establish the forward equilibrium.
Which will be (2*10^-2+x)x=ksp
From this I m getting 19.6
I think the approximation isn't valid since Q isn't that big compared to Ksp.
Wouldn't the denominator be 25?
Is #11 valid?
I tried the method by @Shantanu_Thakur except i took molarity.
And got 19.6g(0.0288M) so I think they assumed approximation is valid and precipitated like I did before.
Can you elaborate a bit ? I didnt get your method
So moles precipitated 0.0288*5
No I meant #11 bro
The 1/ksp thing and the second paragraph
I assumed that the precipitation reaction went to completion without establishing equilibrium.
After that I solved for the forward (dissolving) reaction by
So final moles precipitated should be (310^-5-x)*5
Oh got it, thank you