Question

When olive oil and sodium hydroxide are mixed together, soap and glycerol are made. The solubility of each of the materials are shown in the table below.

Material olive oil sodium hydroxide soap glycerol
Solubility not soluble very soluble soluble soluble

What is the best conclusion, based on the information given?
A.
This is not a chemical reaction because all of the materials mixed can be dissolved in water, and dissolving is a physical change.
B.
This is not a chemical reaction because all of the materials are liquids and can be completely dissolved in water.
C.
This is a chemical reaction because the materials that were mixed have different solubilities than the materials that were made.
D.
This is a chemical reaction because all of the materials used can be combined with water to produce a mixture.

Answer 1

C

Step-by-step explanation:

When a chemical reaction occurs, new materials form. Different materials each have unique physical properties, such as solubility.

When olive oil and sodium hydroxide were mixed together, soap and glycerol were made. The table shows that olive oil and sodium hydroxide have solubilities that are different than soap and glycerol. This means that olive oil and sodium hydroxide are different materials than soap and glycerol. Therefore, this is a chemical reaction because the materials that were mixed have different solubilities than the materials that were made.

Answer 2

C

Step-by-step explanation:

This is a chemical reaction because the materials that were mixed have different solubilities than the materials that were made.