Acids

Question 1

Nitrogen

Answer 1

78%

Question 2

Oxygen

Answer 2

21%

Question 3

Argon

Answer 3

0.96%

Question 4

Carbon Dioxide

Answer 4

0.04%

Question 5

Which is a noble gas in the atmosphere?

Answer 5

Argon

Question 6

Magnesium + Oxygen —> Magnesium Oxide

Answer 6

Bright White light
White powder forms

Question 7

Sulphur + Oxygen —> Sulphur dioxide

Answer 7

Blue Flame

Question 8

Hydrogen + Oxygen —> Water

Answer 8

Squeaky pop

Question 9

Metal + Oxygen = Metal Oxide + Water

Answer 9

Alkaline solution

Question 10

Non-Metal + Oxygen = non-metal dioxide + water

Answer 10

Acidic solution

Question 11

Methylene orange

Answer 11

Acid - Red
Neutral - Yellow
Alkalis - Yellow

Question 12

Phenolphthalein

Answer 12

Acid - colourless
Neutral - colourless
Alkalis - pink

Question 13

Blue litmus Paper

Answer 13

Acid - Red
Neutral - blue
Alkalis - Blue

Question 14

Red litmus paper

Answer 14

Acid - Red
Neutral - Red
Alkalis - Blue

Question 15

Acid

Answer 15

H+ Donor

Question 16

Alkalis

Answer 16

OH- Donor

Question 17

Base

Answer 17

H+ acceptor

Question 18

Acid + Base —>

Answer 18

Salt + water

Question 19

Prepare a sample of pure, dry crystals

Answer 19

• react base with acid
• filter to remove unreacted base
• heat solution in evaporating dish
• remove from heat when crystals start to form
• Leave time for crystals to cool
• Filter out excess solution
• Pat crystals dry with filter paper to remove excess water

Question 20

Acid + Carbonate —>

Answer 20

Salt + Water + Carbon dioxide

Question 21

Acid + Metal —>

Answer 21

Salt + Hydrogen

Question 22

Common Soluble Compounds

Answer 22

• Sodium
• Potassium
• Ammonium
• Nitrate

Question 23

Soluble except with silver and lead

Answer 23

Chlorides

Question 24

Soluble except with calcium, barium and lead

Answer 24

Sulphates

Question 25

Insoluble except with socium, potassium, ammonia

Answer 25

Carbonates and Oxides

Question 26

Insoluble except with Sodium, Potassium, Calcium

Answer 26

Hydroxide

Question 27

Crystallisation

Answer 27

Soluble salt

Question 28

Preciptation

Answer 28

Insoluble salt

Question 29

Prepare a sample of a pure, dry insoluble salt

Answer 29

- mix two solutions - filter preciptate - wash with distilled water - dry in warm place

Question 30

Alkalis are...

Answer 30

bases that are soluble in water

Question 31

Base examples

Answer 31

- Metal hydroxides - Metal oxides - Ammonia

Question 32

Prepare a pure, dry sample of a soluble salt with an insoluble reactant

Answer 32

- Heat acid - Add insoluble base - Filter mixture - Evaporate solution - Remove from heat - Dry crystals