Acids and salts - EL

Question 1

What are metal oxides and hydroxides (alkali, acids or bases)

Answer 1

bases

Question 2

Acid + base ->

Answer 2

salt + water

Question 3

Acid + carbonate ->

Answer 3

salt + water + carbon dioxide

Question 4

Acid + metal ->

Answer 4

salt + hydrogen

Question 5

How does an acid produce salt

Answer 5

acids contain H⁺ ions when in a solution and when they react (get neutralised) the H⁺ gets replaced by a different cation and the resulting ionic compound is a salt

Question 6

Making soluble salts method

Answer 6

add the acid and insoluble base e.g. add excess copper sulphate to sulphuric acid -> warm and filter to get rid off excess CuO -> evaporate off most of the solution -> leave for crystals to form

Question 7

Making insoluble salts method

Answer 7

precipitate reaction -> filter ppt -> wash and dry e.g. NaCl + AgNO3 -> AgCl

Question 8

Making soluble salts method titration

Answer 8

acid and alkali titration -> find end point using indicator -> repeat without indicator -> evaporate off solution -> leave for crystals to form