The solid copper penny, added to liquid nitric acid, formed a brown gas. The nitric acid dissolved the copper into its ions. The solution in the flask turns blue showing the presence of copper ions. Use a gas model with ping pong balls and fan or hair dryer to demonstrate how the atoms are arranged in a solid, a liquid, and a gas. Part of the assessment is the student's responses during the discussions.
Money is no object.
You are to purchase materials and design a method to provide fresh water. Explain what equipment and materials you would use. Draw a diagram and explain your procedure.