A clear, homogenous liquid is heated until bubbling starts. The original liquid can be described as:?

Question

A clear, homogenous liquid is heated until bubbling starts. As it is being heated, a white residue collects around the outside of evaporating dish. The original liquid can be described as:
a) a solution
b) a suspension
c) a pure substance
d) an element
e) heterogeneous

Answer 1

Solution. A solution is a homogeneous mixture of two or more substances which has only 1 phase and can be separated by physical means.

Hint: the liquid is clear - this means no layer or sediment are seen so it is in one phase. It does not separate until you begin to heat it - this is a physical means to separate the solution. The solvent is evaporating and leaving the solute behind as a white residue.

A pure substance is not correct. A pure substance is an element or a compound - something joined by chemical bonds. This cannot be broken apart by physical means. A pure substance is only broken apart by chemical means.

Answer 2

A a solution