A reversible reaction is a reaction that takes place in the . If the reaction were to
, the rate of the forward reaction would equal that of the reverse reaction.

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answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.