Question

1) Calculate the hydroxide ion concentration, [OH−], for a solution with a pH of 5.54

[OH−]=

2)

Calculate either [H3O+]or [OH−] for each of the solutions at 25 °C

Solution A: [OH−]=1.13×10−7

Solution A: [H3O+]=

Solution B: [H3O+]=9.09×10−9

Solution B: [OH−]=

Solution C: [H3O+]=0.000661

Solution C: [OH−]=

Which of these solutions are basic at 25 °C?

Solution C: [H3O+]=0.000661

Solution B: [H3O+]=9.09×10−9

Solution A: [OH−]=1.13×10−7 M

3)

Calculate the hydronium ion concentration, [H3O+], for a solution with a pH of 4.81

[H3O+]=

4)

A solution NaOH(aq) contains 7.87.8 g NaOH(s) per 100.0 mL of solution.

Calculate the pH and the pOH of the solution at 25 °C.

pH=

pOH=

5)

Write the balanced ?a and ?b reactions for HSO3− in water. Include physical states for each species.

?a:

?b:

Answer 1

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