Play or React!

Easy

100

What is the pH of water?

7

200

pH + pOH = ?

14

300

What is the relationship between Ka and pKa?

pKa = -log(Ka)

400

Kb for methylamine is 4.47x10^-4. Find Ka.

Ka = 2.2 x 10^-11

500

You have a buffer solution containing 0.1 M acetic acid (CH3COOH) and 0.2 M acetate ions (CH3COO^-). Given that the pKa for acetic acid is 4.75, calculate the pH of the buffer solution.

pH≈5.05

Piece of Cake

100

what is the pH range for acidic solutions?

The pH range for acidic solutions is 0 to 6.99

200

If the pKa of a weak acid is 4.2, compare its acidity to another weak acid with a pKa of 3.8. Which acid is stronger?

The acid with a pKa of 3.8 is stronger. (lower pKa)

300

Ka . Kb = ?

Kw or 10^-14

400

 If the concentration of hydroxide ions [OH-] in a solution is 1 x 10^-9 M, what is the pH of the solution?

 pH=5

500

What is the concentration of OH^- if [H⁺] = 1.0x10^-3M.

[OH^-]=1.0x10^-11M

Hard

100

If the pH of a solution is 8. What does it mean?

It means it is a weak base

200

How does a weak acid dissociate in water?

A weak acid partially dissociate in water

300

[OH^-] [H₃O⁺] = ?

Kw or 10^-14

400

Ka for acetic acid is 1.75x10^-5 . Find Kb

Kb = 5.7x10^-10

500

Calculate the pH of a buffer solution containing 0.2 M formic acid (HCOOH) and 0.15 M formate ions (HCOO-). (pKa for formic acid is 3.75)

pH ≈ 3.6