ACID & BASE MEASUREMENT

What is the pH scale used to measure?

• density

• acidity or alkalinity

• weight

• temperature

Name a commonly used acid-base indicator.

• methyl orange

• phenolphthalein

• litmus

• bromothymol blue

What happens during a neutralization reaction?

• A neutral substance is formed by mixing an acid and a base.

• An acid reacts with a base to form water and a salt.

• A base reacts with an acid to form water and a salt.

• An acid reacts with a base to form water and a gas.

Explain the concept of titration.

• Titration is a method to determine the color of a solution.

• Titration is a technique used in chemistry to determine the concentration of a specific substance in a solution.

• Titration is a cooking technique used to bake cakes.

• Titration is a process to measure the weight of an object.

What is the pH value of a neutral solution?

• 7

• 10

• 8

• 5

How does the pH scale range from acidic to basic?

• The pH scale ranges from acidic to basic based on the color of the solution.

• The pH scale ranges from acidic to basic based on the temperature of the solution.

• The pH scale ranges from acidic to basic based on the concentration of hydrogen ions in a solution.

• The pH scale ranges from acidic to basic based on the volume of the solution.

What color does litmus paper turn in an acidic solution?

• green

• red

• blue

• yellow

What is the endpoint of a titration?

• The endpoint of a titration is the point at which the burette is filled with the titrant.

• The endpoint of a titration is the point at which the indicator changes color.

• The endpoint of a titration is the point at which the solution becomes too acidic.

• The endpoint of a titration is the point at which the reaction stops.

What is the purpose of using an indicator in an acid-base titration?

• To determine the endpoint of the titration by changing color at a specific pH

• To neutralize the acid being titrated

• To increase the rate of the reaction

• To measure the temperature change during the titration

What is the chemical formula of hydrochloric acid?

• H2Cl

• H2O2

• HCl

• HOCl