equations

Question 1

Equation for hydrogen as a fuel

Answer 1

2H2 + O2 —> 2H2O

Question 2

Equation for percentage yield

Answer 2

%Yield = mass of product made/ maximum theoretical yield of product x 100

Question 3

Atom economy equation

Answer 3

relative formular mass of desired product from equation/ sum of relative formular masses of all reactants from equation x 100

Question 4

equation for neutralisation reactions between an acid and an alkali, how can hydrogen ions reacts with hydroxide ions to produce water

Answer 4

H+ + OH- —> H2O

Question 5

Half equations for electrolysis

Answer 5

2H+ + 2e- —> H2
and
4OH- —-> O2 + 2H2O + 4e-
or
4OH- - 4e- —> O2 + 2H2O

Question 6

mean rate of reaction equations

Answer 6

mror = quantity of reactant used/ time taken
or
mror = quantity of product formed/ time taken

Question 7

acid+metal –>

Answer 7

acid+ metal –> salt + hyrdogen

Question 8

acid + oxide/base –>

Answer 8

acid + oxide/base —> salt + water

Question 9

acid + hydroxide/alkali –>

Answer 9

acid + hydroxide/alkali–> salt + water

Question 10

acid + carbonate –>

Answer 10

acid + carbonate–> salt + water + carbon dioxide