Rate of Reaction: 3A + 5B --> 4C + 2D

Thread starter quietrain
Start date Sep 12, 2011
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Rate Reaction

In summary, a rate of reaction is the measurement of how quickly reactants are transformed into products in a chemical reaction. It is related to the stoichiometric coefficients in a chemical equation, which indicate the relative number of molecules or moles of each reactant and product involved in the reaction. Several factors can affect the rate of reaction, including temperature, concentration of reactants, surface area of reactants, and the presence of a catalyst. The rate of reaction can be measured experimentally by monitoring the change in concentration of a reactant or product over time, using a spectrophotometer or titration. As a reaction progresses, the rate of reaction typically decreases as the concentration of reactants decreases and the concentration of products increases, eventually

Sep 12, 2011

quietrain

consider

3A + 5B ----> 4C + 2D

if this is an elementary process

the rate of reaction is given as

r = k [A]³ [ B ]⁵ , where k is rate constant, [x] are concentrations

so my question is , why is the rate of production of A = 3 times the rate of reaction?

since the rate of reaction has already taken into account the 3 moles of A, shouldn't the rate of production of A = rate of reaction ?

thanks!

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Sep 16, 2011

quietrain

anyone?

1. What is the definition of a rate of reaction?

A rate of reaction is the measurement of how quickly reactants are transformed into products in a chemical reaction. It is typically expressed as the change in concentration of a reactant or product per unit time.

2. How is the rate of reaction related to the stoichiometric coefficients in a chemical equation?

The stoichiometric coefficients in a chemical equation indicate the relative number of molecules or moles of each reactant and product involved in the reaction. Therefore, the rate of reaction is directly proportional to these coefficients. In the given equation, for every 3 moles of A consumed, 4 moles of C are produced, resulting in a rate of reaction that is four times the rate of A consumption.

3. What factors can affect the rate of a chemical reaction?

The rate of a chemical reaction can be affected by several factors, including temperature, concentration of reactants, surface area of reactants, and the presence of a catalyst. These factors can alter the frequency of collisions between particles, which ultimately affects the rate of reaction.

4. How can the rate of reaction be measured experimentally?

The rate of reaction can be measured experimentally by monitoring the change in concentration of a reactant or product over time. This can be done by using a spectrophotometer, which measures the absorbance of a solution, or by using a titration to determine the amount of a reactant or product present at different time intervals. The slope of the resulting graph is equal to the rate of reaction.

5. How does the rate of reaction change as a reaction progresses?

The rate of reaction typically decreases as a reaction progresses, as the concentration of reactants decreases and the concentration of products increases. This is due to the fact that as the reaction proceeds, there are fewer reactant molecules available to collide and form products. Eventually, the reaction will reach a state of equilibrium, where the rate of the forward reaction is equal to the rate of the reverse reaction.