7. Using a calculator calculate the following parameters and fill-in the spaces

Question

7. Using a calculator calculate the following parameters and fill-in the spaces provided. (15 pts) [H] and [OH] a) Calculate [H'] of a solution whose [OH] 2.5 x 10-"M b) Calculate [OH] of a solution whose [H+] = 0.00375 M [H ] and pH b) c) Calculate the pH of a solution whose [H+] = 1 x 10-6 M Calculate the pH of a solution whose [H+] = 6.65 x 10-3 M Calculate the [H] of a solution whose pH 2.68 [OH] and pOH a) Calculate the pOH of a solution whose [OH] = 4.25 x 10-4M b) Calculate the [OH] of a solution whose pOH = 1.14 c) Calculate the pH of a solution whose pOH- 12.00 d) Calculate the pH of a solution whose pOH 3.88 pH and [OH] a) Calculate the pH of a solution whose [OH] = 0.0000015 M b) Calculate the [OH] of a solution whose pH-3.00 c) Calculate the [OH-] of a solution whose pH 10.23 pOH and [H'] a) Calculate the pOH of a solution whose [H+] 1 x 10-1 M b) Calculate the pOH of a solution whose [H] 5.55 x 10-5M d) Calculate the [H+] of a solution whose pOH = 9.87

Explanation / Answer

(1)

(a)

Using relation:

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

Putting values:

[H+]*[2.5*10-4] = 10-14

Solving we get:

[H+] = 4*10-11 M

(2)

Using relation:

pH = -log([H+])

(a)

Putting values:

pH = -log(10-6) = 6

(b)

Putting values:

pH = -log(6.65*10-3) = 2.17

(c)

[H+] = 10-pH = 10-2.68 = 0.0021 M

Hope this helps !

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