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Answer Posted / sa
First, take a clean wire loop of Platinum or nickel-
chromium . They may be cleaned by dipping in hydrochloric
or nitric acid, followed by rinsing with distilled or
deionized water.
Test the cleanliness of the loop by inserting it into a
bunsen burner flame. If a burst of color is produced, the
loop was not sufficiently clean.
Ideally, a separate loop is used for each sample to be
tested, but a loop may be carefully cleaned between tests.
The clean loop is dipped in either a powder or solution of
an ionic (metal) salt. The loop with sample is placed in
the clear or blue part of the flame and the resulting color
is observed.Na+ plus gives dazzling golden yellow flame,Ka+
gives crimson red & when look through blue glass gives
purple colour. Ba salt gives apple green colour , Ca++
gives brick red colour,etc
In this way Flame test is done.
| Is This Answer Correct ? | 18 Yes | 3 No |
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