vera_ewing
  • vera_ewing
Which of the following statements about the pH scale is NOT true?
Chemistry
  • Stacey Warren - Expert brainly.com
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chestercat
  • chestercat
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vera_ewing
  • vera_ewing
taramgrant0543664
  • taramgrant0543664
Which options do you know are true?
vera_ewing
  • vera_ewing
D is true right?

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More answers

taramgrant0543664
  • taramgrant0543664
Yes D is true is because thats what the scale shows us how basic or how acidic your solution is
vera_ewing
  • vera_ewing
Are B and C true?
taramgrant0543664
  • taramgrant0543664
One is true and one is not true
vera_ewing
  • vera_ewing
B is true
vera_ewing
  • vera_ewing
Right?
taramgrant0543664
  • taramgrant0543664
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
vera_ewing
  • vera_ewing
So that means A is true, and the answer is C?
taramgrant0543664
  • taramgrant0543664
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
vera_ewing
  • vera_ewing
Ohhh okay that makes so much more sense! Thank you! :)
taramgrant0543664
  • taramgrant0543664
No problem! Glad to help!
vera_ewing
  • vera_ewing
How about this one? I think either C or D.
vera_ewing
  • vera_ewing
@taramgrant0543664
taramgrant0543664
  • taramgrant0543664
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
vera_ewing
  • vera_ewing
Thank you!
vera_ewing
  • vera_ewing
taramgrant0543664
  • taramgrant0543664
Ok so lets start off with the pH formula do you know what that is?
vera_ewing
  • vera_ewing
Yeah and I got A as my answer. Can you please check if that's right?
taramgrant0543664
  • taramgrant0543664
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
vera_ewing
  • vera_ewing
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
taramgrant0543664
  • taramgrant0543664
Sorry nope! How did you come to the conclusion that it is either B or D?
vera_ewing
  • vera_ewing
Well doesn't pH have to be a multiple of 10?
taramgrant0543664
  • taramgrant0543664
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
vera_ewing
  • vera_ewing
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.
taramgrant0543664
  • taramgrant0543664
It would be A as it releases/donates H+ ions because it is a proton donor
vera_ewing
  • vera_ewing
Thanks! This one?
taramgrant0543664
  • taramgrant0543664
I would say C as the combination should make a a salt and H2O

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