Acid Base Indicators

Acid - Base Indicators

How To Use Table M

0 - 6 Acid
7 - Neutral
8 - 4 Base (Alkaline)

​

The pH Scale

• The first color represents the 1st number down to zero

• The second color represents the second number up to 14

How To Use Table M
Look at the pH range

Multiple Choice

Which indicator is blue in a solution that has a pH of 5.6?

• bromcresol green

• thymol blue

• 
  bromthymol blue

• 
  methyl orange

Multiple Choice

Which indicator is yellow in a solution with a pH of 9.8?

• Methyl Orange

• bromthymol blue

• 
  bromcresol green

• 
  thymol blue

Multiple Choice

According to reference table M, what is the color of the indicator methyl orange in a solution that has a pH of 2?

• Blue

• Orange

• 
  Yellow

• 
  Red

Multiple Choice

An aqueous solution turns litmus red. The pH of this solution could be

• 14

• 8

• 
  11

• 
  4.5

Multiple Choice

Three samples of the same solution are tested, each with a different indicator. All three indicators, bromthymol blue, bromcresol green, and thymol blue, appear blue if the pH of the solution is

• 4.7

• 6.0

• 7.8

• 9.9

Finding Acids and Bases and their pH ranges

• The first color represents an acid all the way to zero (Table K)

• The second color represents a base all the way up to 14 (Table L)

How To Use Table M
Look at the pH range

Multiple Choice

A compound whose water solution conducts electricity and turns phenolphthalein pink is

• HCl

• HC₂H₃O₂

• NaOH

• CH₃OH

Multiple Choice

In which solution will thymol blue indicator appear blue?

• 0.1 M CH₃COOH

• 0.1 M HCl

• 0.1 M KOH

• 0.1 M H₂SO₄

Multiple Choice

When the pH value of a solution is changed from 2 to 1, the concentration of hydronium ions

• (1) decreases by a factor of 2

• (2) increases by a factor of 2

• (3) decreases by a factor of 10

• (4) increases by a factor of 10

Multiple Choice

When the hydronium ion concentration of a solution is increased by a factor of 10, the pH value of the solution

• decreases 1 pH unit

• (2) decreases 10 pH units

• (3) increases 1 pH unit

• (4) increases 10 pH units

Multiple Choice

When the pH of a solution is changed from 4 to 3, the hydronium ion concentration of the solution

• decreases by a factor of 10

• (2) increases by a factor of 10

• (3) decreases by a factor of 100

• (4) increases by a factor of 100

Multiple Choice

When the pH of an aqueous solution is changed from 1 to 2, the concentration of hydronium ions in the solution is

• (1) decreased by a factor of 2

• (2) decreased by a factor of 10

• (3) increased by a factor of 2

• (4) increased by a factor of 10