Acid-Base Indicators Quiz

What is the pH range of an acidic solution?

• Less than 7

• Greater than 7

• Equal to 7

• None of the above

Which of the following is a common acid-base indicator?

• Litmus

• Sodium Chloride

• Water

• Sugar

What color does phenolphthalein turn in a basic solution?

• Red

• Magenta

• Yellow

• Colorless

What type of indicator is a universal indicator?

• Single indicator

• Weak base only

• Mixture of indicators

• Weak acid only

What is the chemical formula for a weak acid indicator?

• HIn

• H2O

• OH-

• H3O+

At what pH does methyl orange change color?

• 3.2 - 4.4

• 1.2 - 2.8

• 6.0 - 7.6

• 8.2 - 10.0

What happens to the equilibrium of a weak acid indicator as pH increases?

• Shifts to the left

• Remains constant

• Becomes neutral

• Shifts to the right

Which of the following is NOT an acid-base indicator?

• Thymol Blue

• Red Cabbage

• Baking Soda

• Phenol Red

What is the color of bromothymol blue in an acidic solution?

• Yellow

• Blue

• Green

• Red

What does the term 'pH' stand for?

• Potential of Hydrogen

• Power of Hydrogen

• Proportion of Hydrogen

• Presence of Hydrogen