• Georgia Military College

• CHE 101

 Introduction: This activity introduces you to solutions and allows you to experience making different concentrations of Kool-aid solution. There are many ways to calculate the concentration of a substance including: molarity (M), parts per million (ppm), percent composition (% comp), and grams per liter (g/L). In chemistry, concentration is usually measured by the number of moles of substance/ liter of substance, or Molarity. Materials: ● Kool-Aid Powder with SUGAR already included (or sugar if you don’t have kool-aid) ● Something to stir solutions ● 4 large cups ● measuring cup (ml preferred but cups will work) Instructions: In this activity you will be making a series of kool-aid solutions. Make sure to record all data and answer all the questions below. Step 1: You will prepare a 237.5 ml kool-aid solution with a concentration of 1M. The molar mass of kool-aid (or sugar since kool-aid is basically sugar C12H22O11.) is 342 g/mol. Show the calculations below which helped you create your 1M solution. Note: 237.5 mL is approximately one cup. Please show your work here. Liters = 237.5 mL x 1Liters 1000mL = 0.2375 L M = Mol/L rearrange formula in terms of mol 0.2375 L x 1M = 0.2375 mol 0.2375 mol x 342 g 1mol = 81.225 g Liters of water needed 0.2375 L Molarity of kool-aid needed 1 M Grams of kool-aid needed 81.225 g Now prepare the solution and make sure to label it (sticky note, pen on plastic cup, piece of paper under cup, etc…) To make this solution: 1. Measure approximately ½ dry cups of the Kool-aid mixture. 2. Pour the Kool-aid powder you measured into a large glass or cup. 3. Measure out the appropriate amount of water (1 cup) and mix into your glass/cup. 5. Stir to mix and label with the appropriate molarity. 6. Don’t taste test it yet, that will come later. Do not discard the leftover 1M solution; we are not done with it yet!