Acids Salts And Bases

Question 1

Colour of Phenolphthalein in acid

Answer 1

Colourless

Question 2

Colour of phenolphthalein in neutral

Answer 2

Colourless

Question 3

Colourless of phenolphthalein in alkaline

Answer 3

Pink

Question 4

Colour of methyl orange in acid

Answer 4

Red

Question 5

Colour of methyl orange in neutral

Answer 5

Orange

Question 6

Colour of methyl orange in alkali

Answer 6

Yellow

Question 7

Colour of red litmus in acid

Answer 7

Red

Question 8

Colour of red litmus in neutral

Answer 8

Red

Question 9

Colour of red litmus in alkali

Answer 9

Blue

Question 10

Colour of blue litmus in acid

Answer 10

Red

Question 11

Colour of blue litmus in neutral

Answer 11

Blue

Question 12

Colour of blue litmus in alkali

Answer 12

Blue

Question 13

What is an indicator

Answer 13

An indicator is a chemical that gives a colour change in acid, neutral or alkaline solutions

Question 14

Hydrochloric acid

Answer 14

HCL, pH 0-2

Question 15

Sulphuric acid

Answer 15

H₂SO₄, pH 0-2

Question 16

Nitric acid

Answer 16

HNO ₃

Question 17

All acids contain…

Answer 17

Hydrogen atoms

Question 18

Strong acid ___________ _____________ in water

Answer 18

Strong acid completely ionises in water

Question 19

Weak acid _____________ ______________ in water

Answer 19

Weak acid partially ionises in water

Question 20

Some or all of these hydrogen atoms are ….

Answer 20

Acidic

Question 21

The acidic hydrogen atoms ionises in water to become …

Answer 21

Hydrogen ions

Question 22

Equation for Hydrochloric acid ionising in water

Answer 22

HCL —> H⁺ + Cl ^-

Question 23

What is a salt?

Answer 23

A compound formed when some or all of the hydrogen ions in an acid are replaced with metal or ammonia ions

Question 24

What ion is present in alkalis

Answer 24

Hydroxide ion

Question 25

What ion is present in acids

Answer 25

Hydrogen

Question 26

Name a strong acid

Answer 26

Hydrochloric acid Nitric acid Sulphuric acid

Question 27

Name a weak acid

Answer 27

Citric acid

Question 28

Name a weak alkali

Answer 28

Ammonia

Question 29

Name a strong alkali

Answer 29

Sodium hydroxide Potassium hydroxide

Question 30

What is a base

Answer 30

A substance that reacts with an acid to produce salt and water

Question 31

What is an alkali

Answer 31

A soluble base

Question 32

What do acids produce when they react

Answer 32

Salts

Question 33

Metal + acid

Answer 33

Salt + hydrogen (MASH)

Question 34

Metal oxide + acid

Answer 34

Salt + water (the oxide and the hydrogen react to give H20 or water)

Question 35

Metal + hydroxide

Answer 35

Salt + water

Question 36

Metal carbonate + water

Answer 36

Salt + carbon dioxide + water

Question 37

Metal hydrogencarbonate + acid

Answer 37

Salt + carbon dioxide + water

Question 38

Test for hydrogen

Answer 38

Will make a squeaky pop with a lighted splint

Question 39

Test for carbon dioxide

Answer 39

Will turn limewater milky when bubbled through

Question 40

Ammonia + acid

Answer 40

Ammonia salt

Question 41

Observations during acid reactions

Answer 41

Solid will disappear (if acid is in excess) Heat is released Metals, metal carbonates and metal hydrogencarbonates will all produce gas a.k.a bubbles

Question 42

Copper carbonate

Answer 42

Green solid

Question 43

Copper oxide

Answer 43

Black solid

Question 44

Copper sulphate

Answer 44

Blue solid