Colorimetry & Complex Ions (AQA A-Level Chemistry): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What does colorimetry measure?
What does colorimetry measure?
Absorption of light by coloured solution
What is the relationship between concentration and absorbance in colorimetry?
What is the relationship between concentration and absorbance in colorimetry?
Greater concentration = greater absorbance
Which colour filter should be used for a blue hexaaquacopper(II) solution?
Which colour filter should be used for a blue hexaaquacopper(II) solution?
Red filter
Why does hexaaquacopper(II) solution appear blue?
Why does hexaaquacopper(II) solution appear blue?
It absorbs red light
What is plotted on the x-axis of a calibration curve?
What is plotted on the x-axis of a calibration curve?
Concentration
How is the colorimeter calibrated before measuring samples?
How is the colorimeter calibrated before measuring samples?
Use distilled water and set absorbance to 0
How full should the cuvette be when measuring absorbance?
How full should the cuvette be when measuring absorbance?
About ¾ full
Which equipment ensures accurate preparation of standard solutions?
Which equipment ensures accurate preparation of standard solutions?
Volumetric flask and pipette
How do you find unknown concentration from a calibration curve?
How do you find unknown concentration from a calibration curve?
Find absorbance on y-axis, draw across to curve, then down to x-axis