Sign in to your Chegg account Student\'s Name PRE- INTRODUCTION ABOVE) Lab Exerc
ID: 147327 • Letter: S
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Sign in to your Chegg account Student's Name PRE- INTRODUCTION ABOVE) Lab Exercise 3C LAB -DILUTING SOLUTIONS PRACTICE PROBLEMS(READ Instructor Directions: Assume that you have a 20 M glycerol stock solution. You need to make 5 different concentrations of solutions for your experiment. For the experiment you will need to make 50 ml of each concentration of glycerol. Use the formula: C1V1 C2V2 Final Concentration of Amount (V1) of 20 M Glycerol Stock Solution (C1) Needed Solution Amount of Water Final Volume of the Solution (V2) 50 ml 50 ml 50 ml 50 ml 50 ml (V2 -Vi) 0 M glycerol 2.5 M glycerol 5 M glycerol 7.5 M glycerol 10 M glycerol Show your calculations for each solution. Remember As long as the units are the same on both sides of this formula it doesn't matter which units you use, they will cancel out. 7.5 M glycerol 0 M glycerol Vi e C2 - Volume of 20 M glycerol needed? Volume of H20 needed? 10 M glycerol 2.5 M glycerol 5 M glycerol 105Explanation / Answer
Required= 0 M Glycerol
Stock= 20 M Glycerol
Volume final = 50mL
V1=?
C1V1=C2V2
V1=C2V2/C1 = (0 x 50)/20= 0mL
Amount of glycerol stock =0mL
Amount of water= 50mL
Required= 2.5 M Glycerol
Stock= 20 M Glycerol
Volume final = 50mL
V1=?
C1V1=C2V2
V1=C2V2/C1 = (2.5 x 50)/20= 6.25mL
Amount of glycerol stock =6.25mL
Amount of water= 43.75 mL
Required= 5 M Glycerol
Stock= 20 M Glycerol
Volume final = 50mL
V1=?
C1V1=C2V2
V1=C2V2/C1 = (5 x 50)/20= 12.5mL
Amount of glycerol stock =12.5mL
Amount of water= 37.5 mL
Required= 7.5 M Glycerol
Stock= 20 M Glycerol
Volume final = 50mL
V1=?
C1V1=C2V2
V1=C2V2/C1 = (7.5 x 50)/20= 18.75mL
Amount of glycerol stock =18.75mL
Amount of water= 31.25 mL
Required= 10 M Glycerol
Stock= 20 M Glycerol
Volume final = 50mL
V1=?
C1V1=C2V2
V1=C2V2/C1 = (10 x 50)/20= 25mL
Amount of glycerol stock =25mL
Amount of water= 25 mL
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