High School

Calculate the initial concentration for a zero-order reaction with a final concentration of 0.645 M, a rate constant of 0.00976 M/min, at 72.7 minutes.

A. 1.59
B. None of these
C. 1.69
D. 1.35
E. 1.47

Answer :

Final answer:

The initial concentration for the zero order reaction is 1.354472 M.

Explanation:

In a zero order reaction, the rate of the reaction is independent of the concentration of the reactant. The rate equation for a zero order reaction is given by: rate = k, where k is the rate constant.

To calculate the initial concentration for a zero order reaction, we can use the formula: initial concentration = final concentration + (rate constant * time).

Given:

  • Final concentration: 0.645 M
  • Rate constant: 0.00976 M/min
  • Time: 72.7 minutes

Using the formula, we can substitute the given values:

initial concentration = 0.645 M + (0.00976 M/min * 72.7 min)

Simplifying the equation:

initial concentration = 0.645 M + 0.709472 M

initial concentration = 1.354472 M

Therefore, the initial concentration for the zero order reaction is 1.354472 M.

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