recall that acids react with some metals and with carbonates and write equations predicting products from given reactants
recall that acids react with some metals and with carbonates and write equations predicting products from given reactants
describe practical procedures to make salts to include appropriate use of filtration, evaporation, crystallisation and drying PAG7
use the formulae of common ions to deduce the formula of a compound
recall that relative acidity and alkalinity are measured by pH including the use of universal indicator and pH meters
use and explain the terms dilute and concentrated (amount of substance) and weak and strong (degree of ionisation) in relation to acids including differences in reactivity with metals and carbonates
**use the idea that as hydrogen ion concentration increases by a factor of ten the pH value of a solution decreases by one **
**describe neutrality and relative acidity and alkalinity in terms of the effect of the concentration of hydrogen ions on the numerical value of pH (whole numbers only) **