Upon heating a sample of a white crystal in the lab, a student finds the results to produce a dark green powder which gives off a reddish-brown gas. What can the student conclude about the composition of the white crystal?
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if a reaction is known to produce a precipitate if ion A is present and ... Note the color and shape of the crystals. ... Fe2+, pale green, pale violet ... Heating a compound can cause a liquid to condense on the inside of the test tube.
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A chemical reaction.
Explanation:
You can conclude this because of the reddish brown gas that is given off. And the change of color.
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