# Rates of reacton/the rate equation

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#1
The initial rate of reaction between Ester A and aqueous NaOH was measured in a series of experiments at a constant temperature. The data obtained are shown below

Experiment:Initial conc of NaOH/mol dm-3:Initial conc of A/mol dm-3 :initialrate.
1. : 0.040 : 0.030. : 4x10-4
2. : 0.040. : 0.045. : 6x10-4
3. : 0.060 : 0.045. : 9x10-4
4. : 0.120. : 0.060. : To be calculated

Use the data in the table to deduce the order of reaction with respect to A and the order of reaction with respect to NaOH. Hence calculate the initial rate of reaction in exp 4.
Order with respect to A-
Order with respect to NaOH-
Initial rate in exp 4-
1
1 year ago
#2
What have you tried so far?
0
1 year ago
#3
To answer rate questions like this you need to start by stating the (generic) rate equation for this reaction. You won't know the order for the ester and NaOH yet, so use &quot;x&quot; and &quot;y&quot; for those (or any other letters!).
Let me know when you have got that far.
1
#4
I don’t even know how to attempt it. My teacher didn’t explain very well.
0
1 year ago
#5
take a look at www.chemguide.co.uk
0
1 year ago
#6
(Original post by Chemistrystxdent)
I don’t even know how to attempt it. My teacher didn’t explain very well.
I will help you work it through. The general rate equation (for 2 reactants) is

Rate = k [X]x [Y]y

where:
k is the rate constant for the reaction
[X] is the concentration of reactant X
x is the order of reaction for reactant X
[Y] is the concentration of reactant Y
y is the order of reaction for reactant Y

Can you write this in a form specific to the reaction in your question.
0
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