Colorimetry

Colorimetry uses the relationship between colour intensity of a solution and the concentration of the coloured species present.

• TRUE

• FALSE

The chosen filter is ______ the colour of the solution being tested.

• complementary to

• same colour as

• darker than

• brighter than

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-5

What is the shape of the graph of Absorbance against Concentration?

• straight line

• parabola

• sine wave

• cosine wave

What happens to Absorbance when the Concentration increases?

• stays the same

• increases

• decreases

Tags

NGSS.HS-PS1-5

The concentration of coloured species must lie in the straight line section of the calibration graph.

• TRUE

• FALSE

How to determine the concentration of the tested solution?

• use absorbance and the calibration graph

• use your eye to analyse the intensity of colour and estimate the concentration

• prepare standard solutions of different concentrations trying to get the same colour as the tested solution

How to draw a calibration graph?

• prepare standard solutions of various concentrations, record their absorbance values and plot on a graph

• draw a line starting at (0,0) with gradient = 1

• draw a line starting at (0,0) with gradient = 2

What colour is complementary to green?

• purple

• red

• violet

• green

What colour is complementary to blue?

• blue

• orange

• yellow

• red

What does 'Abs' stand for on this graph?

• absorption

• absorbance

• abdominal muscles

• anti-lock braking system