Metals / Acids / Salts

Question 1

what is the product of metal + acid

Answer 1

salt + hydrogen

Question 2

what does OILRIG stand for

Answer 2

oxidised 
is
lost
reduction
is
gained

Question 3

what is the test for hydrogen

Answer 3

light a splint , squeaky pop test

Question 4

list 3 observations from the test for hydrogen

Answer 4

bubbles produced
temperature increase
metal dissolves

Question 5

what is used to extract metals from metal oxides

Answer 5

carbon

Question 6

word equation for reduction with carbon

Answer 6

metal oxide + carbon -> metal + carbon monoxide

Question 7

what is the exception for carbon reduction and why

Answer 7

sodium because it is more reactive than carbon

Question 8

what is the first step of the producing salt practical

Answer 8

measure 25ml of acid using measuring cylinder and pour into beaker then heat until acid is warm

Question 9

what is the second step of the producing salt practical

Answer 9

add copper oxide into beaker until solution dissolves in acid

Question 10

what is the third and fourth step of the producing salt practical

Answer 10

stir mixture with stirring rod

filter mixture using filter and funnel paper

Question 11

what is the fifth and sixth step of the producing salt practical

Answer 11

transfer filtered solution into evaporating dish

evaporate until half of liquid is evaporated

Question 12

what is the word equation for neutralisation

Answer 12

acid +alkali -> salt + water

Question 13

what happens when a string acid ionises in water

Answer 13

all (HCl) acid molecules are broken up and produce lots of hydrogen molecules

Question 14

how much stronger is pH 1 than pH 2

Answer 14

10 times

Question 15

how much weaker is pH 4 than pH 1

Answer 15

1000 times weaker