Colorimetry & Complex Ions (AQA A-Level Chemistry): Flashcards

Technique that measures absorption of light by a coloured solution

Greater absorbance

Compare absorbances of known concentrations to find unknown concentration

Colour transmitted through solution

Red light

Red filter (complementary colour)

Use distilled water blank, set absorbance to zero

x-axis: concentration, y-axis: absorbance

¾ full

Find absorbance on y-axis → horizontal line to curve → vertical line down to x-axis concentration