In Investigation Two, students will calculate the density of six unknown substances then observe these substances undergo a chemical reaction. During this Investigation, students will:

1. Calculate the density of six unknown substances using the mass and volume recorded from Investigation 1 using the formula: mass/volume.
2. Observe six unknown substances undergo a chemical reaction when placed in iron chloride, acetic acid, or silver nitrate.

In Investigation Three, students will explore the solubility and miscibility of several substances in water. During this Investigation, students will:

1. Observe whether five solid compounds are soluble in water or not.
2. Observe whether three liquid compounds are miscible in water or not.

In Investigation Four, students will explore the pH of several solid and liquid compounds. During this Investigation, students will:

1. Determine the pH of several liquid and solid compounds in solution.
2. Identified each solution as acidic, neutral, or alkaline (basic).