Kw, [H+] and pH scale

What does pH measure?

• Amount of Oxygen Ions
• Amount of Hydrogen Ions
• The amount of salt in a solution
• The density

The lower the pH, the greater the concentration of :

• OH-
• H+

Which of the following pH values would you expect for a weak base?

• pH = 1
• pH = 14
• pH = 10
• pH = 4

If the pH of a solution is 5.6 the pOH is

• 6.5
• 12.4
• 8.4
• 5.6

A  pH and a pOH will add up to:

• 0
• 7
• 14
• 1.0 x 10^-14

When citric acid is produced by the cells of an orange and dissolves in water, it produces a relatively small number of hydronium ions. Citric acid is best described as a

• concentrated acid. 
• weak acid. 
• dilute acid.
• strong acid.

What does the equation in the image correspond to?

• pKa

• Ka

• pH

• [H+]

Which represents an acid with the smallest Ka value?

• HX

• HY

• HZ

What is the pH of a solution where the [H+] is 1.0 x 10-11?

• 11
• 13
• 14
• 1

If the pH of a solution is 5 the [H+] is

• 1.0 x 10⁵  M
• 1.0 x 10⁹  M
• 5.0 x 10¹  M
• 1.0 x 10^-5  M