![A Moving to another question will save this response. Question 19 Determine the [H30+] for a solution that has a pH of 7.45.](http://img.homeworklib.com/questions/88c49ba0-0917-11eb-8ef0-b774ef9a683d.png?x-oss-process=image/resize,w_560)
Homework Answers
Q 20 )
\Answer =
HBr and HBrO are not a conjugate acid - base pair.
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According to Bronsted-Lowry acid base theory an acid is a proton donor and a bases is a proton acceptor.
Conjugate Acid-Base is a concept of the above theory in other words.
There is a proton difference between a conjugate acid-base pair.
| conjugate Acid | conjugate Base |
| HCl |  |
 |
 |
 |
 |
The pairs given as in the above table are conjugate - acid base pair.
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Q 19 )
BY definition pH is the negaive logarthim of hydronium ion concentration.
![pH=-log[H_{3}O^{+}]](http://img.homeworklib.com/questions/8e965a20-09e7-11eb-8f8b-7bc30ba3e406.png?x-oss-process=image/resize,w_560)
given pH = 7.45
![7.45=-log[H_{3}O^{+}]](http://img.homeworklib.com/questions/8ee97b00-09e7-11eb-a565-f3d778a184a6.png?x-oss-process=image/resize,w_560)
![[H_{3}O^{+}] = 10^{-7.45}](http://img.homeworklib.com/questions/8f3e1920-09e7-11eb-854e-fda1eb6df37f.png?x-oss-process=image/resize,w_560)
By definition of logarthims.
![[H_{3}O^{+}] = 3.47*10^{-8}](http://img.homeworklib.com/questions/8f8dc2f0-09e7-11eb-93ab-ff1f88859648.png?x-oss-process=image/resize,w_560)
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