Time minus the initial time, so this is over 2 - 0. So 0.98 - 1.00, and this is all over the final So the rate would be equal to, right, the change in the concentration of A, that's the final concentration of A, which is 0.98 minus the initial concentration of A, and the initialĬoncentration of A is 1.00. We could do the same thing for A, right, so we could, instead of defining our rate of reaction as the appearance of B, we could define our rate of reaction as the disappearance of A. So that's our average rate of reaction from time is equal to 0 to time is equal to 2 seconds. So the rate of reaction, the average rate of reaction, would be equal to 0.02 divided by 2, which is 0.01 molar per second. So, 0.02 - 0.0, that's all over the change in time. The initial concentration of our product, which is 0.0. So, we write in here 0.02, and from that we subtract So, the Rate is equal to the change in the concentration of our product, that's final concentration Change in concentration, let's do a change inĬoncentration of our product, over the change in time. Rate of reaction here, we could plug into our definition for rate of reaction. So that turns into, since A turns into B after two seconds, the concentration of B is. Let's say the concentration of A turns out to be. Obviously the concentration of A is going to go down because A is turning into B. So, we wait two seconds, and then we measure So at time is equal to 0, the concentration of B is 0.0. Initial concentration of A of 1.00 M, and A hasn't turned into B yet. Now, let's say at time is equal to 0 we're starting with an So we have one reactant, A, turning into one product, B. If we look at this applied to a very, very simple reaction. So, average velocity is equal to the change in x over the change in time, and so thinking about average velocity helps you understand the definition for rate Molar per second sounds a lot like meters per second, and that, if you remember your physics is our unit for velocity. Of a chemical reaction in molar per second. Moles per liter, or molar, and time is in seconds. In the concentration of a reactant or a product over the change in time, and concentration is in The rate of a chemical reaction is defined as the change
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