Acids & Bases

What is the pH scale used to measure?

• The temperature of a solution

• How acidic or alkaline a solution is

• The volume of a liquid

• The weight of a substance

What pH value is considered neutral?

• 10

• 14

• 7

• 0

What is the pH of stomach acid?

• Around 7

• Around 2

• Around 9

• Around 12

What does an acid release in water to make a solution acidic?

• Carbonate ions

• Hydroxide ions

• Hydrogen ions

• Oxygen ions

What is produced when an acid and a base react together?

• An alkali

• A metal

• A gas

• A salt and water

What is the pH of bleach used to clean bathrooms?

• Around 12

• Around 2

• Around 9

• Around 4

What ions do alkalis form in water?

• Hydrogen ions

• Carbonate ions

• Hydroxide ions

• Oxygen ions

What characteristic do bases have in common?

• They taste sour

• They feel slippery

• They turn litmus paper red

• They produce hydrogen gas in reactions with metals

Which of the following is not a property of acids?

• They turn blue litmus paper red

• They have a pH less than 7

• They feel slippery to the touch

• They taste sour

Which of the following is the strongest base?

• oven cleaner - 13.5

• lemon juice - 2.5

• soap - 10

• blood - 7.4