A student added 5 grams of calcium chloride, a white solid substance, to 15 grams of water at 220 C. Several observations were made and the student inferred that a chemical reaction occurred.
Which observation best supports the student's inference that a chemical reaction occurred?
A. The calcium chloride dissolved in the solution.
B. The mass of the solution totals 20 grams.
C. The temperature of the solution is 350 C.
D. The solution became lighter in color
Answers: 1
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A student added 5 grams of calcium chloride, a white solid substance, to 15 grams of water at 220 C....
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