Pure salt water is a solution of sodium chloride and water.

Question

Why is salt water classified as a mixture?

Answer options with 4 options
A.
because water contains a mix of both oxygen atoms and hydrogen atoms

B.
because sodium chloride molecules chemically bond with water molecules to form salt water

C.
because both water and salt contain small amounts of other substances that combine within the solution

D.
because the chemical and physical properties of sodium chloride and water stay unchanged within the solution

Answer 1

Salt water is classified as a mixture because:

D. because the chemical and physical properties of sodium chloride and water stay unchanged within the solution.

In a mixture, the individual components (in this case, sodium chloride and water) retain their own properties and do not undergo a chemical change when combined.