1. Beer\'s law allows us to convert absorbance to concentration (molarity). a. T

ID: 1018224 • Letter: 1

Question

1. Beer's law allows us to convert absorbance to concentration (molarity).

a. True

b. False

2. Why should we leave the top closed when scanning light in the colorimeter probe?

a. The light from the room may interfere with the results.

b. The darkness from the room may interfere with the results.

3. If one plots y = Abs and x = time and the result is a straight line, what is the order of reaction?

4. We are using the colorimeter probe to measure the color change in solution.

a. True

b. False

5.If given the equilibrium Fe 3+ + SCN- <--> Fe(SCN)2+. According to Le Chatelier's Principle, what happens when more Fe3+ is added to the solution?

6.The complex ion formed, Fe(SCN)2+, is

a. Zero b. First c. Second

1. Beer's law lets us convert absorbance to concentration (M),

True

Absorbance = eb x concentration

2. We should leave the top closed in scanning calorimeter,

a. The light in the room may interfere with the results

3. If one plots abs on y-axis and time on x-axis, the order of reaction is,

b. first

4. We use colorimeter to measure the color change in solution,

a. True

5. For the given equailibrium reaction, increasing Fe3+ concentration would,

b. more product is formed

More reactant forces reaction to completion.

6. The complex [Fe(SCN)]2+ is,

a. a dark reddish brown color (like blood)

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