Metals / Acids / Salts Flashcards
what is the product of metal + acid
salt + hydrogen
what does OILRIG stand for
oxidised is lost reduction is gained
what is the test for hydrogen
light a splint , squeaky pop test
list 3 observations from the test for hydrogen
bubbles produced
temperature increase
metal dissolves
what is used to extract metals from metal oxides
carbon
word equation for reduction with carbon
metal oxide + carbon -> metal + carbon monoxide
what is the exception for carbon reduction and why
sodium because it is more reactive than carbon
what is the first step of the producing salt practical
measure 25ml of acid using measuring cylinder and pour into beaker then heat until acid is warm
what is the second step of the producing salt practical
add copper oxide into beaker until solution dissolves in acid
what is the third and fourth step of the producing salt practical
stir mixture with stirring rod
filter mixture using filter and funnel paper
what is the fifth and sixth step of the producing salt practical
transfer filtered solution into evaporating dish
evaporate until half of liquid is evaporated
what is the word equation for neutralisation
acid +alkali -> salt + water
what happens when a string acid ionises in water
all (HCl) acid molecules are broken up and produce lots of hydrogen molecules
how much stronger is pH 1 than pH 2
10 times
how much weaker is pH 4 than pH 1
1000 times weaker