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i got -.021 for H+? is that right?

no it can't be negative

okay so would it be .021 then?

i did the -log of 4.92 and then i multiplied it by the0.030

the first step is wrong, the formula is \(\sf pK_A=-log(K_A)\), so then \(\sf K_A=10^{-pK_A}\)

okay i got 3.61?

what is that?

for H?

Does that make sense to you?
the initial concentration of the acid is 0.030 M

yes

no it can't be higher than the concentration of the acid

yeah, that answer is right

it's not what you wrote before though

yeah i forgot to take the square root

and then for the ph i get 3.22?

yep that's right

yay! thanks!!

no problem !