Acids and Bases Reactions

Which of the following is an acid?

• shampoo

• baking soda

• orange juice

• water

Tags

NGSS.MS-PS1-2

Tastes bitter.

• Acids

• Bases

• Salts

• All

The table below names five acid-base indicators and shows the colours seen at various pH values. The pH values of some solutions are: Sulphuric acid pH= 1.0 Carbonic acid pH= 5.5 Ammonia pH= 9.0 Sodium hydroxide pH= 12.0 By using the CODE letters of indicators, answer the following question. Which indicators show the same colour in sodium hydroxide?

• A and B

• B and D

• D and E

• B and C

What is the colour of methyl orange in an acid?

• Red

• Yellow

• Orange

• Colourless

Tags

NGSS.MS-PS1-2

Which of the following pH is strongly acidic?

• 5.0

• 9.5

• 2.0

• 13.4

Give the products formed when Zinc reacts with Hydrochloric acid?

• Zinc and Hydrogen gas

• Zinc chloride and Oxygen

• Zinc chloride and Hydrogen gas

• Zinc and salt

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is most likely to be basic?

• Orange juice

• Laundry detergent

• Vinegar

• Coke

What is the colour of blue litmus in an acid?

• Pink

• Red

• Purple

• Colourless

Define an indicator.

• It is a flower/plant extract

• It is a commercial made substance

• It is a substance which show different colour when in and acid or a base

• It is a substance which when reacts with an acid forms salt and water as the only products

When hydrogen ion concentration is greater than hydroxide ion concentration, the solution is

• basic

• acidic

• neutral

• alkaline