5.3: Concentration Changes over Time

Multiple Choice

• The reaction is first order because there is only one species

• The reaction is first order if the plot of [H₂O₂] over time is a straight line

• The reaction is first order if the plot of 1/[H₂O₂] over time is a straight line

• The reaction is 2nd order because 2 is the coefficient of H₂O₂ in the equation

Multiple Choice

X--> Products

The rate constant (k) for the decay of the radioactive isotope, X, according to the equation above, is 2.3x10^-2 days. The slope of which of the following graphs is correct for the decay and could be used to confirm the value of k?

• A

• B

• C

• D

• E