Mixtures, Solutions, and Acid-Base Reactions — Test

Question 3 • Physical Science

Eli states that sodium phosphate is a mixture because it is composed of both sodium ions and phosphate ions. Which is the best analysis of Eli’s statement?

Answer

It is incorrect because the two types of ions in sodium phosphate cannot be seen.

It is correct because each ion is a pure substance, so sodium phosphate is made up of two pure substances.

It is incorrect because sodium phosphate is a compound that has a single composition.

It is correct because the composition of sodium phosphate changes depending on the sample.

Explanation

Sodium phosphate is a compound: sodium ions and phosphate ions are chemically combined in a fixed ratio. A mixture has a composition that can vary from sample to sample, but sodium phosphate has a single composition. Therefore, Eli’s statement is incorrect; the best choice is “It is incorrect because sodium phosphate is a compound that has a single composition.”

AI-written and checked against the verified answer.

More from this Course

Test

Test

Test