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# Initial Rates of Reaction watch

1. Can anyone tell me how to work out the initial rate of reaction graphically?
We've not done rates of reaction in class yet, and the question is completely baffling me!!
Thank you!
2. Nice question!

1. the rate of reaction is defined as either the decrease in concentration of reactants per unit time or the increase in products per unit time
2. Mathematically: Rate = Δ[Reactants]/Δtime (the square brackets mean concentration of)
or Rate = Δ[Products]/Δtime
3. To calculate the initial rate, draw a tangent from a graph of either [reactants]/time or [products]/time at the beginning of the reaction (i.e. when the rate is largest and when t ~ 0)
4. Calculate gradient of this line

The gradient is the initial rate of reaction.

Little disclaimer: I'm an average A level student so take what I write with a pinch of salt!
3. (Original post by Spectral)
Nice question!

1. the rate of reaction is defined as either the decrease in concentration of reactants per unit time or the increase in products per unit time
2. Mathematically: Rate = Δ[Reactants]/Δtime (the square brackets mean concentration of)
or Rate = Δ[Products]/Δtime
3. To calculate the initial rate, draw a tangent from a graph of either [reactants]/time or [products]/time at the beginning of the reaction (i.e. when the rate is largest and when t ~ 0)
4. Calculate gradient of this line

The gradient is the initial rate of reaction.

Little disclaimer: I'm an average A level student so take what I write with a pinch of salt!
Wow! Thank you so so much this has really helped

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