Acids & Alkalis

Question 1

Corosive

Answer 1

Cause damage to living tissue and some materials, effects can be permanent.

Question 2

Irritant

Answer 2

Cause skin and tissues to become sore, effects are usually temporary.

Question 3

flamable

Answer 3

Catches fire easily

Question 4

Toxic

Answer 4

Harmful to health.

Question 5

Acids descirbe a….

Answer 5

group of substances that have the same chemical reaction.

Question 6

Acids taste

Answer 6

Sour

Question 7

They are …… substances

Answer 7

Corrosive

Question 8

Household acids

Answer 8

Vinegar

Lemon juice

Question 9

3 most common laboratory acids

Answer 9

Hydrochloric acids
Sulfric acids
Nitric acids

Question 10

Alkalis are

Answer 10

another group of chemicals.

Question 11

Common laboratory alkali

Answer 11

Sodium hydroxide

Question 12

Household alkalis

Answer 12

Bleach
Toothpaste
Oven cleaner
Ammonia

Question 13

Indicators can be

Answer 13

A paper or solution

Question 14

colour of methyln orange in acid

Answer 14

red

Question 15

colour of methyl orange in alkali

Answer 15

yellow

Question 16

colour of bromothymol in acid

Answer 16

Yellow

Question 17

colour of bromothymol in alkali

Answer 17

blue

Question 18

colour of litmus in acid

Answer 18

red

Question 19

colour of litmus in alkali

Answer 19

blue

Question 20

colour of phenolphalein

Answer 20

colourless

Question 21

colour of phenolphthalein in alkali

Answer 21

pink

Question 22

Acids & alkalis can be classified as

Answer 22

weak or strong

Question 23

pH scale uses numbers from

Answer 23

1-14

Question 24

Strong acid

Answer 24

pH 1-3

Question 25

Weak acids

Answer 25

pH 4-6

Question 26

Neutral

Answer 26

pH 7

Question 27

Weak alkali

Answer 27

pH 8-10

Question 28

Strong alkali

Answer 28

pH 11-14

Question 29

Neutralization

Answer 29

a chemical reaction caused by mixing an acid and an alkali.

Question 30

Chemical equation for neutralization

Answer 30

Acid+alkali -> a salt+water

Question 31

everyday examples of neutralization

Answer 31

1) toothpaste neutralizes acid in the mouth. 2) alkali neutralizes bee stings. 3) vinegar neutralizes jellyfish stings. 4) hair conditioner neutralizes the acid in the shampoo. 5) indigestion tablets neutralise the acid in your stomach.

Question 32

Dilution

Answer 32

To add more water to an acid or an alkali

Question 33

pH of an acid

Answer 33

Move todward 7 or increase

Question 34

pH of an alkali

Answer 34

move todward 7 or decrease

Question 35

Acids and Alkalis are

Answer 35

opposite