Free Printable Acids and alkalis revision

Worksheets

Acids and alkalis revision

Total questions: 22

Worksheet time: 11mins

Name

Class

Date

_{What is the hazard shown in this hazard sign?}

Explosive

Corrosive

Irritant

High level Irritant

What colour is universal indicator in a neutral solution?

Green

Orange

Purple

Red

A(n) ______ is a substance with a pH less than 7

Acid

Alkaline

Base

Buffer

A solution with a pH of 3.6 would be...

Acid

Base

Neutral

Acid and Base

According to the pH range which substance is more acidic than lemon juice?

hydrochloric acid

cabbage

milk

lye

Acid + Alkali --> Salt + Water

neutralization reaction

synthesis

decomposition

single displacement

A neutralization reaction will always produce...

water & salt

water

salt

water & carbon

An indicator will ______________ when it is in contact with an acid or base

Bubble

Form a new substance

Change color

Stay the same color

What does pH measure?

the amount of hydrogen (H⁺) ions

the amount of hydroxide (OH^-) ions

amount of water

all of the above

10.

Complete the following reaction:

Hydrochloric acid + magnesium hydroxide -->

Magnesium chloride + water

Magnesium + water

Magnesium chloride + hydrogen

Magnesium chloride + water + carbon dioxide

11.

Complete the word equation below:

Acid + alkali --> ............... + water

water

salt

gold

metal

12.

.............................. + sodium hydroxide --> sodium chloride + water

Nitric acid

Sulphuric acid

Hydrochloric acid

Ethanoic acid

13.

Lithium hydroxide + nitric acid ->

Lithium nitrate + hydrogen

Lithium nitride + salt

Lithium nitrate + water

Lithium nitrate + hydroxide

14.

What is the salt formed when nitric acid is added to potassium hydroxide?

Sodium chloride

Potassium nitrate

Sodium nitrate

Potassium chloride

15.

A few drops of universal indicator caused a solution to turn red. Which of the substance below can we use to neutralise it?

sugar solution

salt solution

alkali solution

acidic solution

16.

How can we tell if enough alkali has been added to neutralise an acidic solution?

a pungent smell is given off as the alkali is added to the solution

there's a change in colour from red to green

there's a change in colour from blue to green

there are bubbles forming on the surface of the mixture

17.

True or False: Acids with a low pH and alkalis with a high pH are considered very dangerous.

True

False

18.

What kind of acid is present in your stomach?

Sulfuric acid

Hydrochloric acid

Citric acid

Nitric acid

19.

Which of the following indicator will show different colour in acid, neutral and alkali?

Phenolphtalein

Universal indicator

Methyl orange

Litmus paper

20.

Nitric acid + __________ $\rightarrow$ Sodium nitrate + Water

Aluminium oxide

Magnesium hydroxide

Sodium hydroxide

Sodium chloride

21.

Which characteristics describe an acid?

sour, indicator turns red, pH less than 7, produces hydrogen ions (H⁺)

bitter, slippery, indicator turns blue, pH greater than 7, produces hydroxide ions (OH^-)

neutral, pH of 7

sour, indicator turns red, pH greater than 7

22.

Which characteristics describe an alkali (base)?