pH & Indicators

Which solution can turn phenolphthalein pink?

• NaOH_(aq)

• CH₃COOH_(aq)

• CH₂OH_(aq)

• HCl_(aq)

Household vinegar has a pH of approximately 3.0. Which would appear yellow when added to a vinegar solution?

• Methyl orange

• Bromcresol green

• Phenophthalein

• Litmus

Which solution would turn litmus red?

• KOH_(aq)

• NaCl_(aq)

• HCl_(aq)

• NH_3(aq)

Which solution would turn litmus blue?

• HCl_(aq)

• CH₃COOH_(aq)

• H₂SO_3(aq)

• NH_3(aq)

Phenolphthalein has a pink color in a solution that has a pH of

• 5

• 11

• 1

• 7

Which indicators would cause a solution with a pH of 2 to turn red?

• Bromthymol blue and thymol blue

• Bromcresol green and litmus

• Litmus and methyl orange

• Methyl orange and phenolphthalein

An indicator was used to test a water solution with a pH of 3. Which indicator color would be observed?

• Yellow with methyl orange

• Pink with phenolphthalein

• Blue with litmus

• Yellow with bromcresol green

To neutralize a solution of HCl_(aq), what solution should be added?

• NaOH_(aq)

• H₃PO_4(aq)

• HNO_3(aq)

• C₁₂H₂₂O_11(aq)

At what pH will bromthymol blue, thymol blue, and bromcresol all be yellow?

• 4

• 2

• 7

• 5

Which of the following colors are false with a solution with a pH of 9?

• Litmus will beblue

• Bromthymol blue will be yellow

• Bromcresol green will be blue

• Phenolphthalein will be colorless