c6 rates of reaction Flashcards
what happens if you decrease temp
equlibrium results in fewer products for the endothermic reaction
what happens if you increase temp
fewer products for the exothermic reaction
what happens if you increase pressure
equilibrium shifts to side with fewer gas molecules
what happens if you decrease pressure
equilibrium shifts to side with more gas molecules
what happens if you increase concentration
reduces number of reactants
what happens if you decrease concentration
reduces number of products
how do you measure rate of reaction with magnesium and HCL
add dilute HCL and measure the mass
add magnesium and plug the flask with cotton wool
start the stopwatch and record the mass
repeat with different concentrations of acid
how to measure the rate of reaction using sodium thiosulfate and HCL
add dilute sodium thiosulfate and place on a piece of paper with a black cross on the bottom
add the HCL and start the timer , time how long it takes for the cross to disappear and repeat with different concentration of HCL
what is a formulation
a useful mixture with a precise purpose that are made following a formula
how do you calculate RF value
distance travlled by substance/ distance travelled by solvent
what is an example of mobile phase
gas or liquid
what is an example of the stationary phase
thick liquid or solid
what are the 4 stages of a life cycle assessment
1- extraction of raw materials
2- manufacture and packaging
3- use of the product
4- disposal of product
what is sustainable development
an approach to development that takes into account the needs of present society whilst not damaging the lives of the future generation
