AC1: Reaction Kinetics
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What is the unit for rate of reaction
moldm^-3s^-1, moles per dm cubed per second
What’s the unit for the rate, first order
s^-1, per second
In rates first order, what is the equation containing K
Rate= K[A]
In rates zero order, what is the equation containing K
Rates = K
For the rate zero order graph with rate and concentration, what does it look like
With a straight horizontal line since the rate is equation to the gradient
In rates zero order, what does the graph containing concentration and time look like
A y=mx line that’s negative / a diagonal line with the same gradient from the y axis until it reaches the x axis
What’s the unit for K in zero order , rates
moldm^-3s^-1, moles per decimeters cubed per second
What’s the unit for K in the 2nd order, rates
mol^-1dm^3s^-1
What’s the unit for K in the 3rd order, rates
mol^-2dm^6s^-1
For first order, what happens to the half life
Nothing the half life remains the same
For 2nd order what happens to the half life
The half life gets longer every time
How do you prove that the curve is first order
If the half lives are the same then it’s first order
When calculating k from a first order graph, what’s the equation with half life
half life = ln2/ k
What’s the first step when plotting a concentration by time graph|
Prepare a standard solution of known concentration of one of the reactants