Question

Fill in the empty squares [H+] pH [OH-] pOH Acid, Base , Neutral 0.01 M 1...

Fill in the empty squares

[H+]

pH

[OH-]

pOH

Acid, Base , Neutral

0.01 M

1 x 10-8M

10
Science   Chemistry   
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Homework Answers

Answer #1

1)

we know that

pH = -log [H+] = -log 0.01 = 2

now

[H+] [OH-] = 10-14

0.01 [OH-] = 10-14

[OH-] = 10-12

now

pOH = -log [OH-] = -log 10-12 = 12

now

pH < 7 , it is acidic

2)

pOH = -log [OH-] = -log 10-8 = 8

[H+] [OH-] = 10-14

[H+] x 10-8 = 10-14

[H+] = 10-6

pH = -log [H+] = -log 10-6 = 6

as pH < 7 , it is acidic

3)

pH = -log [H+]

10 = -log [H+]

[H+] = 10-10

now

[H+] [OH-] = 10-14

10-10 [OH-] = 10-14

[OH-] = 10-4

pOH = -log [OH-]

pOH = -log 10-4 = 4

as

pH > 7 , it is basic

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