Chemical Maths Flashcards
Moles formula
Mass/Mr
Define atom economy
The percentage of reactants that end up as useful products
Atom economy formula
Mr of all desired products/Mr of all reactants x 100
Environmental reasons that high atom economy is important in industrial processes
Mini is waste of non-renewable reactants, reduce pollution from waste products, minimise energy use in heating chemical reactions, reduce water use for cooling chemical reactions
Economic reasons for why high atom economy is important in industrial processes
Make as much useful product as possible, minimise energy use in heating chemical reactions, minimise energy use in running factories
Define theoretical yield
Amount you would get if all the reactants formed their desired products and none of the products were lost
Define experimental yield
The amount you actually get in a reaction
Percentage yield
A percentage to show how successful your reaction was
Percentage yield formula
Experimental yield/theoretical yield x 100
Empirical formula definition
Simplest whole number ratio of the atoms of each element present
Molecular formula definition
Actual number of atoms in a compound
Concentration formula
Moles/volume
What is the volume of 1 mole?
24 dm cubed
Volume formula
Moles x 24 dm cubed (at room temperature)
What is 1 dm cubed in cm cubed?
1000 cm cubed
