Question

name: sc.8.p.8.4 properties of matter: solubility, boiling/melting point, magnetism date: period: 1. katies teacher has given her a sample that contains a mixture of salt, sand, and iron filings. she is instructed to separate the mixture into the three individual components. what would be the best physical property to focus on for the first step in separating the mixture? a) density b) electrical conductivity c) magnetism d) melting point 2. jamal is combining salt with water in order to determine its solubility. he notices that after adding ten spoonfuls of salt, no more will dissolve into the water. which statement best explains his observation? a) there is not enough solute added to the solution. b) the solution has reached its saturation point. c) the density of the salt is being changed. d) the state of the water is being changed.

Explanation:

1. Iron filings are magnetic while salt and sand are not. Using a magnet can separate iron filings first. So magnetism is the best physical - property for the first - step separation.
2. When no more solute (salt) can dissolve in the solvent (water), the solution has reached its saturation point.

Answer:

1. c) Magnetism
2. b) The solution has reached its saturation point.