Acids and alkali

Question 1

Corrosive=

Answer 1

Causes damage to living tissue and some materials. Effects can be permanent

Question 2

Irritant=

Answer 2

Causes skin and tissues to become sore. Effects are usually temporary.

Question 3

Flammable=

Answer 3

Catches fire easily

Question 4

Toxic=

Answer 4

Harmful to health

Question 5

The word acid describes…

Answer 5

A group of substances that have the same chemical reactions.

Question 6

Acids taste…

Answer 6

Sour

Question 7

Three names of household acids!

Answer 7

Vinegar, lemon juice and orange

Question 8

Three laboratory acids!

Answer 8

Hydrochloric acid, sulfuric acid, nitric acid

Question 9

Scientific names for: lemon juice

Answer 9

Citric acid

Question 9

Acids are co…

Answer 9

rrosive substances

Question 11

Scientific names for: stomach acid

Answer 11

Hydrochloric acid

Question 12

Scientific names for: vinegar

Answer 12

Acetic acid

Question 13

Scientific names for: carbonated drinks

Answer 13

Carbonic acid

Question 14

What are alkalis?

Answer 14

Alkalis are another group of chemicals

Question 15

Alkalis are the oppo…

Answer 15

Site of acids. They taste bitter, and often feel ‘soapy’. Many cleaning products are alkali.

Question 16

Household alkalis are…

Answer 16

Bleach, toothpaste, oven cleaner and ammonia.

Question 17

Some laboratory alkalis are…

Answer 17

Sodium hydroxide

Question 18

What is and indicator?

Answer 18

Indicators are substances that changes colour depending on the pH of a solution.

Question 19

Indicators can be…

Answer 19

Paper or solutions

Question 20

Methyl orange changes:

Answer 20

With acid: red

With alkali: yellow

Question 21

Bromothymol blue changes:

Answer 21

With acid: yellow/ orange

With alkali: blue

Question 22

Litmus changes:

Answer 22

With acid: Red

With alkali: Pink

Question 23

Phenolphthalein changes:

Answer 23

With acid: colourless

With alkali: Pink

Question 24

Acids/alkali can be classified as…

Answer 24

Weak or strong

Question 25

What numbers uses the pH scale?

Answer 25

The pH scale uses numbers from 1-14

Question 26

``` Strong acids: Weak acids: Neutral: Weak alkalis: Strong alkalis: ```

Answer 26

``` Strong acids:pH 1-3 Weak acids: pH 4-6 Neutral: pH 7 Weak alkalis: pH 8-10 Strong alkalis:pH 11-14 ```

Question 27

How does the pH needs to be so it is acid?

Answer 27

The pH needs to be between 0 and 6. The less pH the more dangerous the acid is.

Question 28

How does the pH needs to be so it is alkali?

Answer 28

The pH needs to be between 8 and 14. The more pH the more dangerous.

Question 29

If the pH is 7 it means that...

Answer 29

It is a neutral it is not dangerous it is nos acid and it is not alkali.

Question 30

If the pH is 0...

Answer 30

It is very acidic

Question 31

Universal indicator

Answer 31

Shows the acidic or alkali a substance is

Question 32

Acid+ Alkali=

Answer 32

Salt and Water

Question 33

The scientific name for salt for food is...

Answer 33

SODIUM CHLORIDE

Question 34

What are alkalis?

Answer 34

Alkalis are “metal” hydroxides

Question 35

What are the common acid we will use in the lab?

Answer 35

1. Hydrochloric acid 2. Nitric acid 3. Sulfuric acid

Question 36

If you mix copper and hydrochloric you make...

Answer 36

Copper Chloride salt

Question 37

If you mix Iron hydroxide and nitric acid you make...

Answer 37

Iron nitrate salt

Question 38

Hydrochloric acid🔜

Answer 38

Chloride

Question 39

Nitric acid 🔜

Answer 39

Nitrate

Question 40

Sulfuric acid 🔜

Answer 40

Sulfate

Question 41

Neutralisation is...

Answer 41

I chemical reaction, caused by mixing an acid and an alkali

Question 42

What does dilution means?

Answer 42

Dilution means to add more water to an acid or an alkali