1.3. Specification

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a demonstrate an understanding of the terms atom, element, ion,

molecule, compound, empirical and molecular formulae

b write balanced equations (full and ionic) for simple reactions,

including the use of state symbols

c demonstrate an understanding of the terms relative atomic

mass, amount of substance, molar mass and parts per million

(ppm), eg gases in the atmosphere, exhausts, water pollution

d calculate the amount of substance in a solution of known

concentration (excluding titration calculations at this stage), eg

use data from the concentrations of the various species in blood

samples to perform calculations in mol dm-3

e use chemical equations to calculate reacting masses and vice

versa using the concepts of amount of substance and molar

mass

f use chemical equations to calculate volumes of gases and vice

versa using the concepts of amount of substance and molar

volume of gases, eg calculation of the mass or volume of CO2

produced by combustion of a hydrocarbon (given a molar volume

for the gas)

g use chemical equations and experimental results to deduce

percentage yields and atom economies in laboratory and

industrial processes and understand why they are important

h demonstrate an understanding of, and be able to perform,

calculations using the Avogadro constant

i analyse and evaluate the results obtained from finding a formula

or confirming an equation by experiment, eg the reaction of

lithium with water and deducing the equation from the amounts

in moles of lithium and hydrogen

j make a salt and calculate the percentage yield of product, eg

preparation of a double salt (ammonium iron(II) sulfate from

iron, ammonia and sulfuric acid)

k carry out and interpret the results of simple test tube reactions,

such as displacements, reactions of acids, precipitations, to

relate the observations to the state symbols used in equations

and to practise writing full and ionic equations.