Question

Which of the following statements about the pH scale is NOT true?

Answer 1

Which options do you know are true?

Answer 2

D is true right?

Answer 3

Yes D is true is because thats what the scale shows us how basic or how acidic your solution is

Answer 4

Are B and C true?

Answer 5

One is true and one is not true

Answer 6

B is true

Answer 7

Right?

Answer 8

B is actual the not true one the entire scale involves powers of 10 so for example your solution has a pH of 1, that solution is 10x more acidic than a solution of pH2 and 100x more acid than a solution of pH3. The concentration of H+ ions is the same way so going back if you solution has a pH of 1 you have 10x the H+ ions than a solution of pH 2 and 100x more than a pH of 3

Answer 9

So that means A is true, and the answer is C?

Answer 10

A,C and D are all true B is not true because a pH of 4 does not have twice the H+ ions of a solution with a pH of 2. The solution with a pH of 2 would have 100x the H+ ions than the solution of a pH of 4

Answer 11

Ohhh okay that makes so much more sense! Thank you! :)

Answer 12

No problem! Glad to help!

Answer 13

How about this one? I think either C or D.

Answer 14

@taramgrant0543664

Answer 15

Something to note about this is that the H+ and the OH- are in aqueous form where the H2O is actually a liquid the H2O would not be present in the expression. If the H2O was not liquid but aqueous then it would be C but since it is a liquid your answer would be B

Answer 16

Thank you!

Answer 17

This one?

Answer 18

Ok so lets start off with the pH formula do you know what that is?

Answer 19

Yeah and I got A as my answer. Can you please check if that's right?

Answer 20

So the pH formula is pH=-log[H+] you almost had it the right way but you have to include that negative so you would have 10^(-6.89)=[H+] so your answer is C

Answer 21

Thanks!


It's either B or D right?

What is the pH of a solution whose [H+] = 5 × 10-8 M?

A. 7.3
B. 8.0
C. -7.3
D. -8.0

Answer 22

Sorry nope! How did you come to the conclusion that it is either B or D?

Answer 23

Well doesn't pH have to be a multiple of 10?

Answer 24

pH is not necessarily a multiple of 10. The only time it is in multiples of 10 is when you are talking about a solution of pH of 1 being 10x more acidic than the pH of 2 solution or the pH1 solution having 10x more H+ ions than that of a solution of pH2
In this case pH=-log(5x10^(-8))= a pH of 7.3

Answer 25

Ah, okay thank you!

What is true of a Brønsted-Lowry acid?

A. A Brønsted-Lowry acid donates H+ ions.
B. A Brønsted-Lowry acid donates OH- ions.
C. A Brønsted-Lowry acid donates electrons.
D. A Brønsted-Lowry acid donates a metal.

Answer 26

It would be A as it releases/donates H+ ions because it is a proton donor

Answer 27

Thanks! This one?

Answer 28

I would say C as the combination should make a a salt and H2O