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Reactants

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AP Chemistry

Definition

Reactants are substances that start a chemical reaction. They interact with each other to form new substances called products.

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Subjects (10)

Practice Questions (5)

If the chemical reaction has a positive ΔH°, what change in temperature produces extra reactants?
Which of the following best describes the formula ΔHrxn = ΣnΔHf(prod) - ΣmΔHf(reactants)?
A reaction is said to proceed towards equilibrium that is known to have a very large equilibrium value. It is known to start with only the reactants, and it is said to proceed accordingly with no external disturbances. Which of the following would be true of the concentration of both the reactants on a graph?
The rate of the forward reaction is known to be 0.4 M over a certain period of time. Furhtermore, the reaction only started with the necessary reactants. If one of the products has three moles in the reaction, what will be the net change in concentration?
The equilibrium constant for a reaction at a specified temperature is found to be 1.8*10^5, and energy is released when the reaction occurs. Which of the following will allow for the reactants to be favored?

Additional resources (1)

AP Chemistry - 5.10 Multistep Reaction Energy Profile

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