Methods of Identifying Ions (AQA GCSE Chemistry): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is flame emission spectroscopy used to identify?
What is flame emission spectroscopy used to identify?
Metal ions in a sample
What does the spectroscope create from the light in flame emission spectroscopy?
What does the spectroscope create from the light in flame emission spectroscopy?
A line spectrum
Why can each metal ion be identified using flame emission spectroscopy?
Why can each metal ion be identified using flame emission spectroscopy?
Each has a unique pattern of lines
What wavelength is the prominent yellow line in sodium ions' spectrum?
What wavelength is the prominent yellow line in sodium ions' spectrum?
589 nm
How are unknown samples identified in flame emission spectroscopy?
How are unknown samples identified in flame emission spectroscopy?
Comparing spectrum to known patterns
Why is flame emission spectroscopy called an instrumental method?
Why is flame emission spectroscopy called an instrumental method?
Uses a machine for automatic measurement
What advantage does flame emission spectroscopy have regarding sample size?
What advantage does flame emission spectroscopy have regarding sample size?
More sensitive - works with tiny samples
What happens in the first step of flame emission spectroscopy?
What happens in the first step of flame emission spectroscopy?
Sample with metal ions heated in flame
What does the spectroscope do to the light from the flame?
What does the spectroscope do to the light from the flame?
Separates it into component wavelengths
In which colour region are magnesium ions' bright lines found?
In which colour region are magnesium ions' bright lines found?
Green region
If an unknown sample shows lines matching both sodium and calcium, what does it contain?
If an unknown sample shows lines matching both sodium and calcium, what does it contain?
Both sodium ions and calcium ions
Which statement describes advantages over simple flame tests?
Which statement describes advantages over simple flame tests?
More accurate, sensitive and faster