[Csanchez635]

The following results were obtained when a solid was heated by three different pairs of students. In each case the students observed that when they began to heat the solid, drops of liquid formed on the sides of the test tube.

(chart)
Student No. / Mass Before Heating / Mass After Heating
1. / 1.48g / 1.26g
2. / 1.64g / 1.40g
3. / 2.08g / 1.78g

A) Could the solid be a hydrate? What is your evidence?

[Dan]

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