Multiple Choice
When using a solubility test with nitric acid to identify silver ions in a sample, what would you expect to observe?
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4. BONUS: Lab Techniques and Procedures
Test for Ions and Gases
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Which color flame is produced by Na^+ ions during a flame test?
A
Yellow
B
Red
C
Blue
D
Green
Verified step by step guidance1
Understand that the flame test is a qualitative analysis technique used to identify the presence of certain metal ions based on the color they emit when heated in a flame.
Recall that when metal ions are heated, their electrons get excited to higher energy levels and then fall back to lower levels, releasing energy in the form of light with characteristic wavelengths (colors).
Recognize that sodium ions (Na^+) specifically emit light in the yellow region of the visible spectrum due to their electronic transitions.
Note that the yellow color observed in the flame test for Na^+ ions is very distinctive and is often used as a diagnostic tool in chemistry labs.
Therefore, the color flame produced by Na^+ ions during a flame test is yellow.
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