Common Experiments to Measure Rate of Reaction - Sec 3/4 Rate of Reaction #chemistry #olevel

Added: 2026-05-17

[00:00:00]Next, we want to know about some experiments, right? That are used to determine the rate of reaction. So, very common one is like this one, for example, where you can actually measure the volume of your product, which is your [music] gas. For example, if you do a acid plus carbonate reaction, right?

[00:00:15]Then you collect the gas in a graduated gas syringe, right? You can plot a graph of volume of gas against time [music] over here. Again, you realize that the rate actually is very fast and then it will slowly decrease, decrease, decrease because you don't have [music] as high a concentration of reactants as the reaction proceeds. All right, until it plateaus at a certain point, which is Well, obviously, this is like the maximum amount of gas that is being produced over here.

[00:00:41]Okay? The same reaction can be done, okay, but on electronic balance. So, in this case, we're letting the gas escape.

[00:00:49]Right? And when the gas is escaping, you're letting atoms and matter flow into the air, and it won't be part of the mass anymore. Right? So, because of this, your mass overall will just decrease, decrease, decrease, decrease.

[00:00:59]And then this is just another graph that you can plot for this kind of experiment. The rate of reaction can be determined in these two graphs, okay, using the gradient. All right, so you can use the gradient like this one, for example, to find the rate of the reaction at any time.

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