Problem: What is the initial rate of the reaction (in mol•L•s –1) depicted by this graph? 

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We’re being asked for the initial rate of the reaction (in molL-1s-1) based on the graph given. 

An instantaneous reaction rate is the rate at a particular moment in the reaction and is usually determined graphically and can be calculated as:

rate=  t

Δ[  ] = change in concentration
Δt = change in time


For the initial rate, we’ll look at the smallest time possible and determine the concentration at that time. The graph below has a 10-second increments. 

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What is the initial rate of the reaction (in mol•L•s –1) depicted by this graph? 

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Based on our data, we think this problem is relevant for Professor Fleming's class at TEMPLE.