Reacting Quantities

Question 1

Stoichiometry

Answer 1

The ratio of the amount, in moles of each substance

Used to find quantities of reactants required to prepare required quantities of a product

Question 2

How to calculate masses from equations and stoichiometry

Answer 2

Calculate the moles of the known mass
Mole ratio and convert back
Can involve volumes and concentrations

Question 3

How to calculate percentage yield

Answer 3

Percentage yield=actual yield/ theoretical yield x100

Can do it with both moles or mass

Question 4

Limiting reagent

Answer 4

Reactant that is not in excess that will be completely used up and stop the reaction

Question 5

How to calculate the which reactant is the limiting one

Answer 5

Use mole ratio

Question 6

Atom economy

Answer 6

Measure of how well atoms have been utilised

Important for sustainability as they make best use of natural resources

Question 7

Atom economy equation

Answer 7

Sum of molar mass of desired products/ sum of molar masses of all products x100= atom economy