Salts And Acid Base Chemistry

Question 0

Base + acid –>

Answer 0

Salt + water

Question 1

What is the difference between an alkali and a base?

Answer 1

A base is insoluble in water but bases that dissolve in water are alkalis

Question 2

Metal carbonate + acid –>

Answer 2

Salt + water + carbon dioxide

Question 3

Alkali + acid –>

Answer 3

Salt + water

Question 4

Are neutralisation reactions exothermic or endothermic? And what is the ionic equation?

Answer 4

Exothermic.

H+ + OH- –> H2O

Question 5

Why is ammonia alkaline?

Answer 5

Because when it dissolves in water it becomes ammonium hydroxide solution and a hydroxide is alkaline

Question 6

Ammonia + acid –>

Answer 6

Salt

Question 7

What are the three ways soluble salts can be made from acids?

Answer 7

Reacting acids with a metal, an insoluble base or an alkali

Question 8

Describe how you would make a salt from a solid

Answer 8

Add the solid to some dilute acid until no more will dissolve and warm over a Bunsen burner to increase rate of reaction and the filter the solution to remove any unreacted solid. Leave solution in an evaporating dish until nearly all of the solution has been evaporated and salt crystals should appear

Question 9

Describe how to make a salt from an alkali

Answer 9

Place 25cm3 of alkali in a conical flask and add some universal indicator. Using a burette, add acid until the acid has been neutralised while noting the volume of acid needed for neutralisation. Repeat experiment but without indicator and place solution in evaporating dish until it is nearly all gone and salt crystals will appear

Question 10

How is an insoluble salt made?

Answer 10

By mixing two solutions each containing one part of the salt

Question 11

What is the solid product called when two solutions are mixed together?

Answer 11

A precipitate