Edexcel Chemistry Paper 1

Edexcel Chemistry Paper 1
hydrogen ions - ANS✔✔What are acids in solution a source of?
hydroxide - ANS✔✔What are alkalis in solution a source of?
7 - ANS✔✔What is the pH of a neutral solution?
low (less than 7) - ANS✔✔Do acidic solutions have high or low pH values?
high (greater than 7) - ANS✔✔Do alkaline solutions have high or low pH
values?
alkaline - ANS✔✔Is this solution acidic or alkaline?
acidic - ANS✔✔Is this solution acidic or alkaline?
red - ANS✔✔Give the colour of methyl orange indicator when it is put into
an acidic solution
yellow - ANS✔✔Give the colour of methyl orange indicator when it is put
into an neutral solution
yellow - ANS✔✔Give the colour of methyl orange indicator when it is put
into an alkaline solution
colourless - ANS✔✔Give the colour of phenolphthalein indicator when it is
put into an acidic solution
colourless - ANS✔✔Give the colour of phenolphthalein indicator when it is
put into an neutral solution
pink - ANS✔✔Give the colour of phenolphthalein indicator when it is put
into an alkaline solution
it decreases - ANS✔✔What happens to pH when hydrogen ion
concentration increases?
it increases - ANS✔✔What happens to pH when hydrogen ion
concentration decreases?
it decreases by 1 - ANS✔✔What happens to pH as hydrogen ion
concentration in a solution increases by a factor of 10?
a concentrated solution has a higher amount of substance dissolved in the
solution - ANS✔✔What is the difference between a concentrated and dilute
solution?
one that only partially dissociates into ions - ANS✔✔What is a weak acid?
one that fully dissociates into ions - ANS✔✔What is a strong acid?

, any substance that reacts with an acid to form a salt and water only -
ANS✔✔What is a base?
soluble bases - ANS✔✔What are alkalis?
salt + hydrogen - ANS✔✔Complete this equation: acid + metal -->
salt + water - ANS✔✔Complete this equation: acid + metal oxide -->
salt + water - ANS✔✔Complete this equation: acid + metal hydroxide -->
salt + carbon dioxide + water - ANS✔✔Complete this equation: acid +
metal carbonate -->
a lit splint causes a 'pop' - ANS✔✔What is the test for hydrogen?
lime water - ANS✔✔What is needed to test for carbon dioxide?
lime water turns cloudy - ANS✔✔What is the test for carbon dioxide?
a reaction between an acid and a base - ANS✔✔What is a neutralisation
reaction?
H+ + OH- → H2O - ANS✔✔Write a general equation for a neutralisation
reaction
titration - ANS✔✔What technique needs to be used if soluble salts are
prepared from an acid and a soluble reactant?
burette - ANS✔✔Name this piece of apparatus
pipette - ANS✔✔Name this piece of apparatus
they are all soluble - ANS✔✔What is true about common sodium,
potassium and ammonium salts?
true - ANS✔✔True or false: all nitrates are soluble
false: common chlorides are soluble except those of silver and lead -
ANS✔✔True or false: all chlorides are soluble
silver and lead - ANS✔✔Give 2 examples of metals that form insoluble
chlorides
false: common sulfates are soluble except those of lead, barium and
calcium - ANS✔✔True or false: all sulfates are soluble
lead, barium and calcium - ANS✔✔Give 3 examples of metals that form
insoluble sulfates
false: common carbonates and hydroxides are insoluble except those of
sodium, potassium and ammonium - ANS✔✔True or false: all carbonates
are soluble
sodium, potassium and ammonium - ANS✔✔Give 3 examples of cations
that form soluble carbonates