Acids and Bases

Which of the following is an acid?

• vinegar

• bleach

• sugar

• starch

• toothpaste

What are the properties of acids? (Check all that apply.)

• Corrosive

• Good conductors of electricity

• Produce hydrogen gas when react with metal

• Sour in taste

• Turn litmus paper blue

Which of the following is a base?

• baking soda

• orange juice

• vinegar

• lemonade

Soap is a base.  What is true about the taste of bases?

• they taste sour
• they taste sweet
• they taste bitter
• they taste salty

Organize these options into the right categories

Groups:

(a) Acid

,

(b) Both

,

(c) Base

• can change the color of litmus paper

• strong ones can damage the skin and cause burns

• toothpaste

• changes blue litmus paper red

• baking soda

• changes red litmus paper blue

• lemons

• good conductors of electricity

• olive oil

• react with water

• tend to corrode or rust metals

• are soluble

Which of the following is a property of a base? (Check all that apply.)

• bitter taste

• reacts with acids to form salt and water

• feels slippery or soapy

• releases hydroxide icons (OH-)

• releases hydrogen icons (H+)

Bases have many uses. They are mainly used to make:

(Check all that apply.)

• cleaning products

• soaps

• concrete

• ceviche

Match the following:

• hydroxide ion (OH-)

• Acid

• hydrogen ion (H+)

• Base

• base that is soluble in water

• Alkali

What is the pH scale used for?

• The pH scale is used to measure the temperature of a solution.

• The pH scale is used to measure the acidity of a solution.

• The pH scale is used to measure the volume of a solution.

• The pH scale is used to measure the density of a solution.

Answer explanation

The pH scale is used to measure the acidity or alkalinity of a solution.

What are indicators used for in the context of acids and bases?

• Indicators are used to measure the temperature of a solution.

• Indicators are used to determine the pH level of a solution.

• Indicators are used to determine the concentration of a solution.

• Indicators are used to identify the color of a solution.