Please enable JavaScript.
Coggle requires JavaScript to display documents.
rate laws - Coggle Diagram
rate laws
experimental methods
-
in situ- measure concentration of one the chemicals inside the reaction vessel (+) dont have to stop the reaction
-
ex situ- measure concentration of the chemicals outside the vessel. reaction is stopped at given time limits then the the concentration is measure via quenching (x) have to run several repetitions of the reactions in order to measure conc at different stages of the experiment
quenching (DCS)
sudden cooling- stop reaction on thermodependant reactions- through sudden decrease in temp, the rate of reaction is decreased so much that is stops
dilution- diluting using deionised water, spreads the reactants far enough away from each other that they dont react anymore - successful collisions are unlikely
-
-
overall orders
zero order- reaction rate is constant until all constants are consumed eg heterogenous catalysis reactions.
first order- only 1 reactant is present in RDS, rate and concentration are proportional
second- either 1 rectant where its concentration has a squared relationship with rate, or 2 reactants with first order
reaction concentrations
product concentration- increase over time, reactant concentration decreases over time
-
-
isolation method- for multiple reactants. change the conditions of the reaction so there is only 1 reactant to determine the orders for reactions for each reactant
