U4-1-1 - Colorimetry Flashcards

1
Q

Colorimetry measures how intense the colour of a solution is. The _________ the concentration, the more intense the colour.

A

Colorimetry measures how intense the colour of a solution is. The higher the concentration, the more intense the colour.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What measurement is taken during colorimetry?

A

Absorbance of visible light

(or transmittance)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How do you decide which colour filter/light to use in colorimetry?

A

Must be complementary to the colour of the solution.

(e.g. solution is green = use purple filter/light)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What must be done to the colorimeter before the absorbance of a solution can be measured?

A

Must be calibrated using a blank

(only solvent in cuvette, usually deionised water)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is a complementary colour?

A

Opposite on the colour wheel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Name this piece of equipment

A

Cuvette

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

The absorbance measured for a solution gave a concentration higher than any of the standard solutions used to prepare the calibration graph.

What can be done to make the results more accurate?

A

Dilute the sample

OR

prepare new standard solutions of greater concentration.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

To draw a colorimetry calibration graph:
* ____________
* select a suitable filter (complementary colour)
* calibrate colorimeter using a blank
* measure (and plot) absorbance.

A

To draw a colorimetry calibration graph:
* prepare a set of standard solutions
* select a suitable filter (complementary colour)
* calibrate colorimeter using a blank
* measure (and plot) absorbance.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

To draw a colorimetry calibration graph:
* prepare a set of standard solutions
* ____________
* calibrate colorimeter using a blank
* measure (and plot) absorbance.

A

To draw a colorimetry calibration graph:
* prepare a set of standard solutions
* select a suitable filter (complementary colour)
* calibrate colorimeter using a blank
* measure (and plot) absorbance.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

To draw a colorimetry calibration graph:
* prepare a set of standard solutions
* select a suitable filter (complementary colour)
* ____________
* measure (and plot) absorbance.

A

To draw a colorimetry calibration graph:
* prepare a set of standard solutions
* select a suitable filter (complementary colour)
* calibrate colorimeter using a blank
* measure (and plot) absorbance.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

To draw a colorimetry calibration graph:
* prepare a set of standard solutions
* select a suitable filter (complementary colour)
* calibrate colorimeter using a blank
* ____________.

A

To draw a colorimetry calibration graph:
* prepare a set of standard solutions
* select a suitable filter (complementary colour)
* calibrate colorimeter using a blank
* measure (and plot) absorbance.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly