EXPERIMENT 3: MAKING SOLUTIONS
For this experiment, you will use correct and incorrect methods to make 0.5 M and 20% weight/weight solutions of sucrose. Make sure you measure to the bottom of the meniscus when measuring volumes.
1. "0.5 M" solution A:
a. Label the food safe measuring cup "Molar solution A" and weigh it empty.
b. Weigh out enough sucrose to make a 150 mL of a 0.5M solution of sucrose.
c. Measure 150 mL water to a food safe measuring cup and add it to the sucrose. Stir to dissolve and record the new weight.
d. Subtract the weight of the empty container to get the weight of your solution.
2. "0.5 M" solution B:
a. Label the food safe measuring cup "Molar solution B" and weigh it empty.
b. Weigh out enough sucrose to make a 150 mL of a 0.5M solution of sucrose.
c. Put the sucrose in the measuring cup and FILL UP to 150 mL. Stir to dissolve and record the new weight.
d. Subtract the weight of the empty container to get the weight of the solution.
3. "20% w/w" solution A:
a. Label the food safe measuring cup "Percent solution A" and weigh it empty.
b. Weigh out 20 g sucrose and put it into the container.
c. Add 100 g water to the container. Stir to dissolve and record the new weight.
d. Subtract the weight of the empty container to get the weight of your solution.
4. "20% w/w" solution B:
a. Label the food safe measuring cup "Percent solution B" and weigh it empty.
b. Weigh out 20 g sucrose and put it into the container.
c. Add 80 g water to the container. Stir to dissolve and record the new weight.
d. Subtract the weight of the empty container to get the weight of your solution.