Acid and alkalis

Question 1

Formula for Hydrochloric Acid

Answer 1

HCl

Question 2

Formula for Nitric Acid

Answer 2

HNO3

Question 3

Formula for Sulfuric Acid

Answer 3

H2S04

Question 4

Formula for Sodium hydroxide (Alkali)

Answer 4

NaOH

Question 5

Formula for Potassium hydroxide (Alkali)

Answer 5

KOH

Question 6

Formula for Calcium hydroxide (Alkali)

Answer 6

Ca(OH)2

Question 7

What does soluble mean ?

Answer 7

It can dissolve in water

Question 8

What does Insoluble mean ?

Answer 8

It can’t dissolve in water

Question 9

What is a solute ?

Answer 9

A solid (eg: salt)

Question 10

What is a solvent ?

Answer 10

A liquid (eg: Water)

Question 11

What is a solution?

Answer 11

When a solute disolve in a solvent (eg: sea water)

Question 12

Where to find solubility of substance from databooklet?

Answer 12

page eight

Question 13

What does saturated mean?

Answer 13

Too much solute / when the solute stop dissolving in the solution

Question 14

What is a precipitate

Answer 14

A soluble substance appears in solution

Question 15

What is the pH of acids?

Answer 15

Less than 7

Question 16

What is the pH of water/ neutral solution?

Answer 16

pH of exactly 7

Question 17

What is the pH of a base/ alkali?

Answer 17

pH more than 7

Question 18

What is the pH scale a measure of?

Answer 18

The concentration of hydrogen ions in any given solution

Question 19

How can the pH be measured?

Answer 19

By universal indicator
pH paper
pH meter

Question 20

What is the name for H+

Answer 20

Hydrogen ions

Question 21

What is the name of OH-

Answer 21

Hydroxide ions

Question 22

In pure water what is the concentration of H+ and OH- ions?

Answer 22

Hydrogen ions = hydroxide ions

Question 23

What ion does all acids contain?

Answer 23

H+ / Hydrogen ions

Question 24

Why do acidic and alkaline solutions conduct electricity well?

Answer 24

They contain oppositely charged ions that are free to move in solution and can carry charge

Question 25

Formula for Ethanoic acid

Answer 25

CH3COOH

Question 26

What is the proportion of hydroxide and hydrogen ions in alkaline solution ?

Answer 26

More OH- than H+

Question 27

What happens to the pH and the concentration of an acid when you dilute it?

Answer 27

The pH goes up and concentration of the acid goes down

Question 28

What happens to the pH and the concentration of an alkali when you dilute it?

Answer 28

The pH goes down and concentration of the alkali goes down

Question 29

If a metal oxide is soluble in water what does it produce ?

Answer 29

An alkali

Question 30

If a non metal oxide is soluble in water what does it produce

Answer 30

An acid

Question 31

What does acids contain?

Answer 31

Charged particles called hydrogen ions

Question 32

what is the difference between a base and an alkali

Answer 32

A base is a substance that neutralises an acid A base that is soluble in an alkali All alkalis are bases but not all bases are alkalis

Question 33

What is a spectator ion?

Answer 33

It's an ion that exists in the same form on both the reactant and product sides of a chemical reaction

Question 34

what is titration?

Answer 34

an experimental method to determine the concentration of an unknown solution.

Question 35

How to recognise hydrogen? (test for hydrogen?)

Answer 35

Burns with a pop

Question 36

How to recognise oxygen? (test for oxygen)

Answer 36

Relights a glowing splint

Question 37

How to recognise carbon dioxide? (test for carbon dioxide)

Answer 37

Turns lime water cloudy

Question 38

What is the name of a metal oxide that do not dissolve in water but is capable of neutralising an acid?

Answer 38

a base

Question 39

What are the products of this reaction: Hydrochloric acid + potassium carbonate?

Answer 39

potassium chloride + water + carbon dioxide

Question 40

What are the products for this reaction: | Sulfuric acid + Lithium oxide? (write the chemical formula for the salt produced)

Answer 40

Lithium sulfate + water Salt: Lithium Sulfate, formula: Li2SO4

Question 41

What is the formula for Sodium carbonate?

Answer 41

Na2CO3