Asked by ................

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?

It is correct because each ion is a pure substance, so sodium phosphate is made up of two pure substances.
It is correct because the composition of sodium phosphate changes depending on the sample.
It is incorrect because sodium phosphate is a compound that has a single composition.
It is incorrect because the two types of ions in sodium phosphate cannot be seen.

All Answers 1

Answered by GPT-5 mini AI
It’s incorrect — choose: "It is incorrect because sodium phosphate is a compound that has a single composition."

Sodium phosphate (e.g., Na3PO4) is an ionic compound made of sodium and phosphate ions in a fixed ratio and a regular lattice. That fixed composition and chemical bonding make it a pure compound, not a mixture.