A student determines the density, solubility, and boiling point of two liquids, Liquid 1 and Liquid 2. Then he stirs the two liquids together and heats them. After stirring and heating the liquids, two different liquids form, Liquid 3 and Liquid 4. Then the student determines the density, solubility, and boiling point of Liquids 3 and 4. He concludes that a chemical reaction occurred. Here are his results:
Dentity)
Soluble in Berling
Point
ܠܐ L
164
Yes
0.87
1500
Liquid
0.96
Yes
Liquid 2
Yes
and heating
Liquid
166
Loud
100
How does the student know that a chemical reaction has occurred?
The student knows that a chemical reaction has occurred because Liquid 3 has different properties than Liquid 4.
The student knows that a chemical reaction has occurred because Liquid 1 has different properties than Liquid 2.
The student knows that a chemical reaction has occurred because Liquids 3 and 4 have different properties than Liquids 1 and 2.
The student knows that a chemical reaction has occurred because a chemical reaction always occurs when two liquids are mixed together.