Concentration + Salts

Question 1

What is concentration

Answer 1

The mass of a solute in a certain volume of solvent

Question 2

how many cm in a dm?

Answer 2

1000cm3 = 1dm3

Question 3

What do all acids contain?

Answer 3

hydrogen

Question 4

Name the 3 acids and the formula?

Answer 4

Hydrochloric acid = HCl
Nitric acid = HNO3
Sulfuric acid = H2SO4

Question 5

Whats the difference between alkali and base

Answer 5

Alkali is a soluble base
Base is a insoluble alkali

Question 6

Name an example of an alkali and a base

Answer 6

alkali - lithium HYDROXIDE

base - calcium oxide

Question 7

Acid + alkali -> _______ + _____

Answer 7

salt and water

Question 8

hydrochloric acid + copper oxide ->

nitric acid + sodium hydroxide
->

sulphuric acid + copper oxide

Answer 8

copper chloride + water

sodium nitrate + water

copper sulfate + water

Question 9

Outline steps to crystillsation practical

Answer 9

1. Add 40cm3 of sulphuric acid to a beaker
2. Warm this beaker using a bunsen burner (to speed up reaction)
3. After warming the acid up, add in copper oxide and stir until it is in excess (to ensure it has all reacted)
4. Using a filter funnel and paper, filter the solution to get rid of the excess copper oxide into a conical flask
5. Pour the solution into an evaporating dish
6. Fill up a beaker with around 150ml of water
7. Place the evaporating dish on top of the beaker and heat up the beaker using a bunsen burner UNTIL COPPER SULPHATE HAS HALVED
8. Leave the dish to crystallise

Question 10

complete the general word equations

1. metal + acid ->
2. metal oxide + acid ->
3. metal hydroxide + acid ->
4. metal carbonate + acid ->

Answer 10

1. salt + hydrogen
2. salt + water
3. salt + water
4. salt + water + carbon dioxide

Question 11

Definition of soluble

Answer 11

a solute that dissolves in a solvent