The purpose of the activity was to make standard 1% solution of glucose in water, and to use this as a control solution.
Introduction
Standard solutions are important so that we have a known standard to compare things. The purpose of the activity was to make standard 1% solution of glucose in water, and to use this as a control solution. This particular solution of glucose was going to be made using 1g of glucose and 100ml of water thus making the percentage of glucose 1%.
Materials
- Bunsen burner
- Test tube
- Squeezy bottle
- Glucose crystals
- Measuring boat
- 100ml conical flask
- Benedict’s solution
- Tripod
- Beaker
- Top pan balance (an electronic scale used to measure very light weights)
Method
After collecting all the apparatus, I was ready to conduct my experiment.
First of all, I was to place the weighing boat on the top pan balance and set the balance 0. Next I was to place the glucose crystals onto the top pan balance. By carefully adding the glucose crystals, I eventually managed to get the weight of exactly 1g. The glucose from the weighing boat was then transferred to a conical flask, and the glucose that remained in the weighing boat was rinsed into the flask. This was also done for any glucose on the sides of the flask. Water was then added until there was nearly 100ml. I wanted 100ml but pouring the water from a top will not be precise; either there will be too much or too little water.