Question

an aqueous solution that has a hydrogen ion concentration of 1.0 × 10-8 mol per liter has a ph of

Answer 1

If H^+ is the hydrogen ion concentration,\[pH=-\log[H^+]\]

Answer 2

Looks like you don't even need a calculator to solve this one.

Answer 3

So is that the answer?

Answer 4

Can you find the common log of 10^-8 ?

Answer 5

The choices are
6, which is acidic
8,which is acidic
8, which is basic
6, which is basic

Answer 6

What do you think?

Answer 7

I was think either A or B

Answer 8

Both of those are incorrect. If you take the common log of a power of ten, the answer is just the exponent. So \[pH=-\log 10^{-8}=-(-8)=8\]

Answer 9

Do you know what pH is considered neutral (neither acid nor base)?

Answer 10

7

Answer 11

Acids are above or below that?

Answer 12

below

Answer 13

OK, so you know what to do. What's the answer?

Answer 14

c

Answer 15

Well done. Do math every day.