Question

The larger the pH scale value, the:

higher the concentration of H3O+ ions
lower the concentration of H3O+ ions
lower the concentration of OH− ions
more acidic the solution

(I would say the more acidic the solution am I correct?)

Answer 1

Hint: Higher concentration of H+ means lower pH and lower pH means it is more acidic.

Answer 2

High Ph is basic

Answer 3

It's a low concentration of hydronium ions. Just remember, high Ph = low hydronium; low ph = high hydronium.

Answer 4

(hydronium = h30+)

Answer 5

ohhh ok so if thats true then it's C?

Answer 6

No, it's B.

Answer 7

oh my bad!

Answer 8

OH- would be high on a high ph value.

Answer 9

I understand now thank you for your help again!

Answer 10

:D

Answer 11

Do you think you could help with with another problem I have here?

Answer 12

Maybe, I'm rusty @ chemistry

Answer 13

The question is
A solution has a [OH−] of 1 x 10−12. What is the pOH of this solution?

Answer 14

Poh?

Answer 15

pOH apparently that's what it is. It doesn't say what it stands for...

Answer 16

Oh; take the negative log of 1x10^-12

Answer 17

The, to find PH from POH, subtract that from 14

Answer 18

I don't know why this works, but it's the procedure

Answer 19

is the answer 2 then?

Answer 20

lol you didn't post the answers

Answer 21

Oops sorry! The possible answers are

2
7
10
12

Answer 22

12

Answer 23

So, you punch this in your calculator:

-(log(1e-12))

and you get 12

Answer 24

e stands for x10^

Answer 25

not to be confused with e, the number

Answer 26

Oh I understand!

Answer 27

so really -(log(1x10^(-12)))

Answer 28

And if you have to find PH next, just subract that from 14, and PH is 2

Answer 29

Unless you really love chemistry, it's best to just try to memorize these things and pass the course :P i hate it

Answer 30

I dislike it too and honestly I can't remember any of it. I guess I just really need to start working on that

Answer 31

Try to come up with tricks; like sulfite is just 'aiiight" cause it has one less oxygen than sulfate, which ate one more oxygen lol

Answer 32

haha Ok i'll be sure to use those tricks next time!

Answer 33

Just a brief mostly-math display of why pH + pOH = 14.
If we agree that this relation of H3O+ and OH- holds:
[H3O+] x [OH-] = 1x10^(-14)

Then it follows by the negative logarithm of both sides that:
-log( [H3O+]x[OH-] ) = -log(1x10^(-14))
By a logarithm property, log(ab) = log a + log b. We can simplify -log(10^(-14)) = 14.
-log[H3O+] + -log[OH-] = 14
Note the remaining logarithms are the definitions of pH and pOH, respectively.
pH + pOH = 14
But I do agree that memorizing this idea will probably be the best bet, primarily rewriting it as often as possible usually helps, or flash cards too sometimes..

Answer 34

It's looks complicated but I'm sure I'll get the hang of it thank you AccessDenied!

Answer 35

you're welcome! and i'm sure you will get it! :)

Answer 36

@AccessDenied Thanks! Now I understand why. :)