Topic 6.1 - Techniques for Measuring Rates of Reaction

what is a continuous method

measuring a change over time

what is a non continuous method

measuring the time taken for a certain event to occur

what are the three continuous categories

reactions that produce a gas, reactions that change colour or produce a precipitate, reactions with ions

what are the three non continuous categories

time taken for a solid reactant to be completely consumed, time taken for precipitate to cover a word, clock techniques

how to measure rate in reactions that produce a gas

measure the total mass change of the reaction mixture using an electronic balance or collect the gas and measure the volume/pressure as the reaction proceeds

what are the conditions to measuring rate in reactions that produce a gas with an electronic balance

gas produced should have a higher molar mass, and not soluble in a solvent

what is a method of gas collection

downward water displacement

what is a method to measure rate in reactions that change colour or produce a precipitate

the intensity of the coloured reactant/product can be monitored with a spectrophotometer

what else can a spectrophotometer measure

absorbance change or percent transmittance

how to measure rate of reactions with ions

conductivity change can be measured over time

what is a clock technique

an observable change will occur when one reactant is completely consumed (e.g. colour change)