A dropperful of 0.1 M Pb(NO3)2 was added to a dropperful of 0.1 M KI in a test tube. The mixture turned bright yellow and a powdery substance settled to the bottom of the test tube. What sign(s) of chemical change occurred?   change in temperature permeant color change permeant change in pH formation of solid precipitate formation of a gas an odor was produced

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