2. Calculate the [H+] in the following solutions, given their pH, and identify the solution as acidic, basic or neutral.

a) pH = 2.5


b) pH = 11.7


c) pH = 6.8


d) pH = 3.31

Respuesta :

Answer:

a) acidic; [H+] = 10^-2.5 = 3 x 10^-3

b) basic; [H+] = 10^-11.7 = 2 x 10^-12

c) slightly acidic (almost neutral); [H+] = 10^-6.8 = 1.6 x 10^-7

d) acidic; [H+] = 10^-3.31 = 4.9 x 10^-4

Explanation:

pH < 7 is acidic; pH > 7 is basic; pH = 7 is neutral

[H+] = 10^-pH

A is acidic, B is basic, C is slightly acidic, and D is acidic.

What is pH?

pH, quantitative measure of the acidity or basicity of aqueous or other liquid solutions.

a) Acidic; [[tex]H^+[/tex]] = [tex]10^-^2^.^5[/tex] = [tex]3 X 10^-^3[/tex]

b) Basic; [[tex]H^+[/tex]] = [tex]10^-^1^1^.^7[/tex] = [tex]2 X 10^-^1^2[/tex]

c) Slightly acidic (almost neutral); [[tex]H^+[/tex]] = [tex]10^-^6^.^8[/tex]= [tex]1.6 X 10^-^7[/tex]

d) Acidic; [[tex]H^+[/tex]] = [tex]10^-^3^.^3^1[/tex]= [tex]4.9 X 10^-^4[/tex]

pH < 7 is acidic; pH > 7 is basic; pH = 7 is neutral

Hence, a is acidic, b is basic, c is slightly acidic, and d is acidic.

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