Question

What is the [H3O+] of a solution with a pH of 2.56?

2.56 M

2.75 x 10-3 M

363 M

-0.408 M

Answer 1

pH =-log[H+]
[H+]=10^(-2.56)

Answer 2

-0.408 M?

Answer 3

Another thing: H3O+ or hydronium ion, is the same as H+

\[[H3O ^{+}] = [H ^{+}]\]

Answer 4

Nope that's not it it won't be a negative number

Answer 5

@mmazach always remember with concentration you can't have a negative number

Answer 6

Dang.. 2.56?

Answer 7

Nope still not it and it wouldn't be the exact same as the ph

Answer 8

Ohh so 363

Answer 9

Did you type it into a calculator?

Answer 10

Yes but I think I've been typing it in incorrectly. Was 363 wrong too?

Answer 11

Yes it was 10 to the exponent of -2.56

Answer 12

It was wrong