A sample of a hydrated salt weighing 1.167 g is heated until no more water is given off. The mass of the anhydrous salt was 0.6298 a) What is the mass of water lost by the sample?

The mass of water lost is:

(2) = 1 − 2 = 1.167 − 0.629 = 0.538

The mass % of water in the hydrated salt is:

(2) =

(2)

1

=

0.538

1.167 ∙ 100% = 46.0 %

0.538 g; 46.0 %

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.