Question

Classify the following as solution or heterogeneous mixture. (a) normal urine (b) gasoline (c) batter for chocolate chip cookies

Short answer

Explain your answer in one to two sentences. Answer: Normal urine is considered a solution because it contains dissolved substances like salts, urea, and other metabolic waste products that are uniformly distributed throughout the liquid.

Step-by-step solution

(a) Classify normal urine

Normal urine is produced by the process of filtration in the kidneys, and it contains various dissolved substances such as salts, urea, and other metabolic waste products. Since these substances are uniformly distributed throughout the liquid, normal urine can be classified as a solution.

(b) Classify gasoline

Gasoline is a mixture of various hydrocarbons that are obtained from crude oil during the refining process. The hydrocarbons in gasoline mix uniformly, resulting in a single-phase substance with consistent properties throughout. Therefore, gasoline can be classified as a solution.

(c) Classify batter for chocolate chip cookies

A batter for chocolate chip cookies typically consists of ingredients like flour, sugar, fat, and chocolate chips. When you mix these ingredients, it is clearly visible that there are distinct boundaries between the chocolate chips and the rest of the batter. This indicates that the batter for chocolate chip cookies is a heterogeneous mixture.