Classifying Acids and Bases

Identify all of the acids from the options below.

• H₂SO₄

• HCl

• NaOH

• CaCO₃

An acid has a pH...

• from 0 to 6

• from 8 to 14

• from 5 to 10

• between 6 & 7

All acids form ions when dissolved in water. Which ion makes the solution acidic?

• H⁺

• OH^-

• A^-

• B⁺

Tags

NGSS.MS-PS1-1

Alkalis form ions when they dissolve in water. Which ion makes the solution alkaline?

• H⁺

• OH^-

• A^-

• B⁺

What is the pH of pure water?

• 0

• 4

• 7

• 10

• 14

Citrus fruits are often used in cooking for their flavour. What would you expect the pH of a lemon to be?

• 0

• 2

• 4

• 8

Soaps and cleaning products are often alkaline. What would you expect the pH of soap to be?

• 7

• 9

• 11

• 13

What is the name of the indicator used to show the pH of a solution?

• Litmus indicator

• Universal indicator

• Methyl orange indicator

• Bromothymol blue indicator

When an acid reacts with another chemical, water is sometimes one of the products. However, their is one product that is always made. What is the name of this product?

• water

• carbon dioxide

• hydrogen

• a salt

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When carbon dioxide gas is tested with a lit (or burning) splint, what happens?

• The splint goes out

• There is a small explosion and a squeaky 'pop' sound

• The splint burns more brightly