Question

What is the rate of a reaction if the values are

Answer 1

Answer:

Explanation:

Hi there,

To get started, let's first observe our rate law:

$R=k[A]^2[B]^2$     we typically use square brackets [x] for chemistry kinetics, because they specifically tell us we are dealing with concentrations.

This rate law is in fourth-order, because the concentrations powers add up to 4. We are not told the unit of time for this prompt (unless you know it), so I just assumed the time unit to be "time."

To calculate the reaction rate, we simply plug in the concentration of A and B into the rate law. k is the rate constant and stays the same for an individual reaction.

$R=(0.1 \ M^{-3}*time^{-1})[1 \ M]^2[2 \ M]^2=0.4 \ M/time$

Thus, the rate of reaction with those concentrations is 0.4 M/time.

Notice, the rate constant does in fact have units of it own. The unit for k can be calculated by knowing that:

1. Rate (R) must end up with units of concentration (M) per time.
2. The concentrations raised to a power can be used to help solve for the units of k.

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