Question

1. having studied mixtures at school, daniel wanted to investigate how to separate the parts from different mixtures. he knew that the individual components of a solution kept their properties. so, daniel gathered his materials and began to separate some of the mixture combinations. which of the following tests could he perform to separate different kinds of mixtures? choose the three statements that apply.

a. use a cup of salt and dissolve it by adding water.
b. use a magnet to separate the metal parts.
c. use a hotplate to evaporate the liquid.
d. use a filter to separate large particles.

Explanation:

• Option B: A magnet can be used to separate magnetic metal parts from non - magnetic substances in a mixture.
• Option C: Evaporation using a hotplate can separate a liquid from a dissolved solid (e.g., salt - water solution, when water evaporates, salt is left behind).
• Option D: Filtration is a common method to separate large particles (e.g., sand from water) as the large particles cannot pass through the filter while the liquid (or smaller particles in a solution) can.

Option A is about making a solution (dissolving salt in water) not separating a mixture.

Answer:

B. Use a magnet to separate the metal parts, C. Use a hotplate to evaporate the liquid, D. Use a filter to separate large particles.