Final answer:
To prepare a 0.2 M fructose solution, dissolve 18.016 grams of fructose (with a molar mass of 180.16 g/mol) in less than 500 mL of water and then adjust the volume to exactly 500 mL.
Step-by-step explanation:
How to Make a 0.2 Molar Solution of Fructose
To create a 0.2 molar (0.2 M) solution of fructose, you will need to know the molar mass of fructose, which is about 180.16 g/mol. First, calculate the number of moles required for 500 mL (0.5 L) of solution: 0.2 moles/L × 0.5 L = 0.1 moles. Then, multiply this by the molar mass of fructose to get the mass needed: 0.1 moles × 180.16 g/mol = 18.016 grams of fructose.
Dissolve the 18.016 grams of fructose into a small volume of water, followed by diluting with more water until the total volume reaches 500 mL. It is important to ensure the fructose is completely dissolved before making up to the final volume to obtain the correct concentration.
Please remember to use proper lab safety equipment and procedures when handling chemicals and preparing solutions.