Question

student-response activity
1 wendy wants to find out if a substance is an acid or a base. what are two ways that wendy could investigate to find out what kind of substance it is?
2 identify the three subatomic particles. where are each of the particles located within the atom?
3 how does saltwater differ in its composition from distilled water?

Explanation:

Step1: Answer for question 1

Use litmus paper. Blue litmus paper turns red in acid, red litmus paper turns blue in base. Also, use a pH - meter. If pH<7, it's an acid; if pH>7, it's a base.

Step2: Answer for question 2

The three sub - atomic particles are protons, neutrons, and electrons. Protons and neutrons are in the nucleus, electrons are in the electron cloud around the nucleus.

Step3: Answer for question 3

Distilled water is pure H₂O. Saltwater is a solution of water (H₂O) and dissolved salts (such as sodium chloride, NaCl). So saltwater has dissolved ions (e.g., Na⁺ and Cl⁻) in addition to water molecules, while distilled water just has water molecules.

Answer:

1. Use litmus paper and a pH - meter.
2. Protons and neutrons are in the nucleus, electrons are in the electron cloud.
3. Saltwater has dissolved salts (ions) while distilled water is pure water.