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4 cards from this section. Quick, good the night before a test.
What is the average rate if the concentration changes from 5M to 3M over 4 seconds?
Remember to subtract the final concentration from the initial.
If the concentration of a reactant decreases from 10M to 8M in 2 seconds, what is the average rate?
Look for how much the concentration changes in that time.
The average rate of a reaction is determined by which of the following?
Think about what the average rate measures.
True or False: Instantaneous rate can only be calculated at the endpoints of a reaction.
Consider where slopes can be drawn on a graph.
If a reactant decreases from 10M to 3M in 7 seconds, calculate the average rate. Then, calculate the instantaneous rate at 3 seconds if the graph shows a linear decrease.
Break it into parts: calculate average first, then use slope for instantaneous.
Consider a reaction where the concentration starts at 5M and goes to 2M over a varying time interval (0-4s is 1M change, 4-8s is 0.5M change). Calculate average rate for each segment and compare them.
Focus on each interval separately to find the respective average rates.
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