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Limitations:
- The nichrome wire may still have impurities after cleaning in the hydrochloric acid. This may have an affect on the colour of the flame. This in turn will have an affect on the results obtained, having an affect on the whole experiment.
- Another limitation is that the flame already burns red/orange so this may make it a judgement call of what colour the flame is. If this judgement is incorrect the results of the experiment will be affected.
- The test cannot differentiate between all elements. Several metals produce the same flame colour. Some compounds do not change the colour of the flame at all.
- Sodium is present in most compounds and will colour the flame. Sometimes a blue glass is used to filter out the yellow of sodium.
- The test cannot detect low concentrations of most ions.
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Is it sufficient to identify a cation on a flame test?
It is not suffiecient to identify a cation only on a flame test.æ You must also identify the color of the flame which corresponds to a certain element.
How can a flame test be used to determine the identity of an element?
Some flame colours are characteristic of metals present, eg Lilac for K+, Red for strontium. However, this is only indicative, because there are a few at least that have a red colour, so it needs to be proven further with a chemical test
What does the flame test tell you about chemicals?
With the flame test we can identify some chemical elements; see the link to Wikipedia, for ex.
What does the flame test give off to identify a substance?
The color of the flame test is specific for some metals. See the link below.
when is flame test used?
to identify an unknown sample by its emission spectrum
What is the use of flame test?
to identify atoms present on an element
Is it sufficient to identify a cation on a flame test?
It is not suffiecient to identify a cation only on a flame test.æ You must also identify the color of the flame which corresponds to a certain element.
Conclusion in flame test?
During a flame test, elements are heated, and their, electrons of the atoms gain energy from the flame. When they lose this energy, they emit colors of visible light. Since each element has its own specific light, you can easily identify which element has been heated
How can a flame test be used to determine the identity of an element?
Some flame colours are characteristic of metals present, eg Lilac for K+, Red for strontium. However, this is only indicative, because there are a few at least that have a red colour, so it needs to be proven further with a chemical test
What does the flame test tell you about chemicals?
With the flame test we can identify some chemical elements; see the link to Wikipedia, for ex.
What color is hydrogen in flame test?
hydrogen color flame test is purple due to the acids and element combinationa
How does a flame test help to identify inorganic substances?
The color of the flame is indicative of the constituent elements.
What does the flame test give off to identify a substance?
The color of the flame test is specific for some metals. See the link below.
when is flame test used?
to identify an unknown sample by its emission spectrum
What element is an alkaline earth metal and in a flame test forms a green flame?
Boric Acid
What information does a flame test provide?
The emission spectrum of an element
What information does flame test provide?
The emission spectrum of an element
