1. .How will the concentration of crystal violet be measured in this experiment?

Question

1. .How will the concentration of crystal violet be measured in this experiment?

Question 9 options:

absorbance

rate constant

temperature

time

2. A certain reaction is followed by the change in its absorbance at 615 nm as a function of time. A plot of 1/Absorbance vs time is found to be linear.

What is the order of the reaction?

zero order

first order

second order

3. If the linear regression line for the plot of ln[Absorbance] vs time is ln[Abs] = 0.25-0.54t, what is the numerical value for k?

4. When you plot ln[A]=-kt + ln[A]0, what part of the equation represents the y-intercept?

k

ln[A]0

t

ln[A]

A)

absorbance

B)

rate constant

C)

temperature

D)

time

Explanation / Answer

answers :

1) A ) absorbance

2) second order

explanation:

ln A vs time graph will give second order

3) answer : k = 0.54

explanation :

ln[A]=-kt + ln[A]0

                      y = m x + C

m = k = 0.54

4) answer : y - intercept = ln[A]0

explanation:

ln[A]=-kt + ln[A]0

y = m x + C

y - intercept = C = ln[A]0              

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