A section of a non-biodegradable polymer is shown. Name the kind of polymer shown.
Draw the monomer structure used to form this polymer.
This polymer is commonly disposed of by combustion. Suggest one problem associated with this disposal method.
Lactic acid is used to make poly(lactic acid), a biodegradable polymer. Suggest the meaning of the term biodegradable.
Draw the partial structure of poly(lactic acid), showing at least two repeat units.
A factory uses 500 tonnes of lactic acid to produce poly(lactic acid). Although the percentage yield is 100%, the mass of poly(lactic acid) formed is below 500 tonnes. Explain why.
Aqueous lactic acid reacts with acidified potassium manganate(VII). The solution changes from purple to colourless. Suggest what happens to the lactic acid in this reaction.
Aqueous lactic acid is neutralised by aqueous sodium hydroxide. State the ionic equation for this neutralisation.
Aqueous lactic acid reacts with magnesium. Name the gas produced in this reaction.