PH problem

[MoooShuuu]

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How would you do this problem:

What is the pH of a saturated aqueous solution of Ca(OH)2? The Ksp is 8.0 x 10-6.

Thanks!

 

[MoooShuuu]

Anyone?

 

[Contach]

How would you do this problem:

What is the pH of a saturated aqueous solution of Ca(OH)2? The Ksp is 8.0 x 10-6.

Thanks!

Ca(OH)2
ksp = x * (2x)^2 = 4x^3
8e-6 = 4x^3
divide both sides by 4
2e-6 = x^3
cube root both sides (you should be able to know how to do this)
about ~~ 1.4e-2 = x

now, the pOH = -log [OH-] and 14 = pH + pOH
you should be able to do the rest from there.. learn your log rules to do the pOH calculation without a calculatrice

 

[myair]

How would you do this problem:

What is the pH of a saturated aqueous solution of Ca(OH)2? The Ksp is 8.0 x 10-6.

Thanks!

The fsolution is basic so even if you don't know the log rules you can cross out the acidic choices and increase your choices by chosing the basic one.
good luck to you tomorrow

 

[Contach]

The fsolution is basic so even if you don't know the log rules you can cross out the acidic choices and increase your choices by chosing the basic one.
good luck to you tomorrow

i really hope you dont have to resort to guessing on a simple problem like this.

and i really hope your test isnt tomororw. but goodluck anyways.