Determining the Formula of an Unknown Hydrate Experiment 6 A. Identification of True Hydrates Compound Color of solution before heating Water droplets after heating (Yes/No) Color of the residue after heating Color of True solution hydrate after adding (Yes/No) water to the residue Nickle(II) chloride Sucrose Cobalt(II) chloride Potassium chloride rate .

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e