Question

What is the pH of a solution whose [H3O+] is 1 X 10 -6 M?
What is the pH of a solution whose [H3O+] concentration is 3.2 X 10-4 M?
What is the pH of a solution with a [H3O+] concentration of 1.5 X 10 -13 M?
Problem Set #2:

Find the pH of a solution whose [H3O+] is 6.5 X 10 -4 M.
Find the pH of a solution whose pOH is 5.36.
What is the pOH of a solution with a [OH -] concentration of 9.7 X 10 -11 M?
Calculate the pH of a solution with a [OH -] concentration of 2.3 X 10 -7 M.

Answer 1

Answer on Question #50411, Chemistry, Other

**Task:**

a) What is the pH of a solution whose $\left[\mathrm{H}_{3} \mathrm{O}^{+}\right]$ is $1 \times 10^{-6} \mathrm{M}$?

b) What is the pH of a solution whose $\left[\mathrm{H}_{3} \mathrm{O}^{+}\right]$ concentration is $3.2 \times 10^{-4} \mathrm{M}$?

c) What is the pH of a solution with a $\left[\mathrm{H}_{3} \mathrm{O}^{+}\right]$ concentration of $1.5 \times 10^{-13} \mathrm{M}$?

d) Find the pH of a solution whose $\left[\mathrm{H}_{3} \mathrm{O}^{+}\right]$ is $6.5 \times 10^{-4} \mathrm{M}$.

e) Find the pH of a solution whose pOH is 5.36.

f) What is the pOH of a solution with a $\left[\mathrm{OH}^{-}\right]$ concentration of $9.7 \times 10^{-11} \mathrm{M}$?

g) Calculate the pH of a solution with a $\left[\mathrm{OH}^{-}\right]$ concentration of $2.3 \times 10^{-7} \mathrm{M}$.

**Answer:**

a) $pH = -\lg [H_3O^+]$

$pH = -\lg [1\cdot 10^{-6}] = 6$

b) $pH = -\lg [H_3O^+]$

$pH = -\lg [3.2\cdot 10^{-4}] = 3.5$

c) $pH = -\lg [H_3O^+]$

$pH = -\lg [1.5\cdot 10^{-13}] = 12.8$

d) $pH = -\lg [H_3O^+]$

$pH = -\lg [6.5\cdot 10^{-4}] = 3.2$

e) $pH + pOH = 14$

$pH = 14 - pOH = 14 - 5.36 = 8.64$

f) $pOH = -\lg [OH^{-}]$

$pOH = -\lg [9.7\cdot 10^{-11}] = 10$

g) $pOH = -\lg [OH^{-}]$

$pOH = -\lg [2.3\cdot 10^{-7}] = 6.6$

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