Question

(choose 2) kcl is which of the following *
pure substance
mixture
compound
element
homogenous
heterogenous
(choose 2) sand and water is which of the following *
pure substance
mixture
compound
element
homogenous
heterogenous

Explanation:

• For \(KCl\):
• A pure substance has a definite composition. \(KCl\) is made up of \(K\) (potassium) and \(Cl\) (chlorine) in a fixed ratio by chemical bonds.
• A compound is a pure substance composed of two or more different elements chemically combined. \(KCl\) fits this as it has two elements (\(K\) and \(Cl\)) chemically bonded.
• For Sand and Water:
• A mixture is a combination of two or more substances that are not chemically combined. Sand and water are just mixed together, not chemically bonded.
• A heterogeneous mixture has a non - uniform composition. Sand (solid) and water (liquid) do not mix uniformly; you can see the sand particles in the water.

Answer:

• For \(KCl\): Pure Substance, Compound
• For Sand and Water: Mixture, Heterogeneous