Wwwgcse-sciencecom gcse twenty first century science candidate style answers specimen gcse twenty first century science additional science a a154 chemistry a a174 practical investigation factors that affect the rate of reaction of calcium carbonate. Practicals in this specification include investigating factors affecting the rate of a reaction and testing for the presence of a double bond in an unknown prepare your students in exam technique with the help of exemplar student answers and examiner commentaries that show how examiners interpret the mark scheme. Rates of reaction coursework introduction in this piece of science coursework i will be experimenting how the rate of reaction between sodium thiosulphate and hydrochloric acid is affected by the concentration of sodium thiosulphate i will measure the rate of reaction by mixing the different quantities of sodium. Using white paper helped the marking to stand out i used this to gauge when to stop the reaction – when the black x was obscured by the white sulphur precipitate, the timer was stopped goggles 3|page anjelina qureshi mrs gravell rates of reaction coursework chemistry year 11 i had to wear goggles, to protect my.
My investigation is about the rate of reaction a rate of reaction is defined as how fast or slow a reaction takes place for example, the oxidation of iron under the atmosphere is a slow reaction which can take many years, but the combustion of butane in a fire is a reaction that takes place in fractions of a second.
In order to get maximum marks in this coursework it is vital that you discuss all factors which affect the rate of a reaction these include: temperature the higher the temperature the more energy there is within the reaction when there is energy in the reaction more reactants hit each other and then there are more successful.
This is a set of exam questions and markscheme for gcse chemistry rates of reaction i have curated these questions using past paper gcse questions.