Question

Which solution will be basic? (a) [H3O+] = 10-5M (b) [H3O+] = 10-12 M (c) [H3O+] = 10-7M (d) [H3O+] = 10-4 M

Answer 1

Answer:

2) [H3O+] = 10-12

Explanation:

pH = - log [H3O+]

1) [H3O+] = 10-5

pH = - log [H3O+] = 5 - acidic

2) [H3O+] = 10-12

pH = - log [H3O+] = 12 - basic

3) [H3O+] = 10-7

pH = - log [H3O+] = 7 - neutral

4) [H3O+] = 10-4

pH = - log [H3O+] = 4 - acidic

NOTE:  - log ($10^{-x}$) = x

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