In this lab, students will investigate dissolving using M&M’s and saliva, teeth, and tongue variables. They will determine whether dissolving happens faster without assistance, or with the assistance of the tongue and teeth.
By the end of this lesson, students should be able to
- understand solutions.
- determine what causes a solution to dissolve faster.
- indentify solutes and solvents.
This lesson supports students’ understanding of
Lesson: 30–40 minutes
For each group:
- 3 plain M&M’s for each student
- Student food allergies should be noted ahead of time, since food products are used in the experiment.
- Food should never be consumed in a lab setting. This experiment should not take place in a lab or in an area close to chemicals.
- Safety goggles should always be worn when working in a lab setting.
- M&M’s can be substituted with another candy-coated treat if there are food allergies.
For the Student
You will create a solution and predict what method dissolves a piece of candy the fastest. You will also determine the solute and solvent in your trials as well as several solution examples.
- 3 M&M’s
- a timer
Please be sure you remind your teacher of any food allergies.
Read the procedure. What do you think will happen?
- Collect your materials. You and your partner will take turns dissolving M&M’s in your mouth while recording the time it takes for each trial.
- Trial 1-Place one piece of candy in your mouth and allow it to dissolve without using your tongue or teeth to help. Record the time (in seconds) it takes for the candy shell to dissolve.
- Trial 2- Place another piece of candy in your mouth and allow it to dissolve using only your tongue to move it around. Record the time (in seconds) it takes for the candy shell to dissolve.
- Trail 3- Place another piece of candy in your mouth and allow it to dissolve using your tongue and teeth. Record the time (in seconds) it takes for the candy shell to dissolve.
- Define solute and solvent
- What were the solute and the solvent in this experiment?
Solute= _______________ Solvent= _____________
- What do your results tell you about the time it took to dissolve the candy?
- Explain your results. Why did this happen?
- Determine the solute and the solvent in the following examples:
|Ocean water = salt and water|
|Kool-Aid = powder, sugar, and water|
Antifreeze = water and ethylene glycol
|Lemonade = water, lemon juice, and sugar
- What liquid is called the “universal solvent”?
What did you learn from this activity about solutions?