Acida, Bases And Salts

Question 1

What colour does litmus go in acidic solution

Answer 1

Red

Question 2

What colour does litmus indicator go in neutral solution

Answer 2

Purple

Question 3

What colour does alkaline solution go in litmus solution

Answer 3

Blue

Question 4

What colour does phenolphthalein indicator go in acidic solution

Answer 4

Colourless

Question 5

What colour does phenolphthalein indicator go in neutral solution

Answer 5

Colourless

Question 6

What colour does phenolphthalein indicator go in alkaline solution

Answer 6

Pink

Question 7

What colour does methyl orange indicator go in acidic solution

Answer 7

Red

Question 8

What colour does methyl orange indicator go in neutral solution

Answer 8

Yellow

Question 9

What colour does methyl orange indicator go in alkaline solution

Answer 9

Yellow

Question 10

What are acids in aqueous solution?

Answer 10

They are a source of hydrogen ions

Question 11

What are alkalines in aqueous solution?

Answer 11

They are a source of hydroxide ion

Question 12

What can acids do?

Answer 12

Neutralise alkalines

Question 13

What can acids do?

Answer 13

Neutralise alkalines

Question 14

When do we use precipitation method?

Answer 14

When the salt is insoluble

Question 15

When do we use titration method?

Answer 15

When the salt is sodium potassium or ammonium (SNAP salts)

Question 16

When do we use excess solid method?

Answer 16

When the salt is soluble

Question 17

Which salts are ALWAYS soluble?

Answer 17

SNAP! Sodium, potassium and ammonium

Question 18

What is the rule for all nitrates?

Answer 18

All soluble

Question 19

Which chlorides are NOT soluble?

Answer 19

silver and lead (ll)

Question 20

Which sulfates are NOT soluble?

Answer 20

barium, calcium and lead (ll)

Question 21

Which carbonates ARE soluble?

Answer 21

Sodium, potassium and ammonium

Question 22

Which hydroxides ARE soluble?

Answer 22

sodium, potassium and calcium

Question 23

Is acid a proton donor or acceptor?

Answer 23

Donor

Question 24

Is a base a proton donor or acceptor?

Answer 24

Acceptor

Question 25

Metal + Acid =?

Answer 25

Salt + Hydrogen

Question 26

State the bases

Answer 26

Metal oxide, metal hydroxide and ammonia

Question 27

Describe an experiment to prepare a pure, dry sample of a soluble salt starting from an insoluble reactant (eg barium carbonate)

Answer 27

= Excess Solid method 1. Add barium carbonate to the acid 2. Add barium carbonate until in excess 3. Filter off the excess barium carbonate 4. Heat solution to evaporate the water 5. Leave to crystallise 6. Filter the crystals 7. Leave crystals to dry in a warm place

Question 28

Metal + Base = ?

Answer 28

Water + salt