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The purpose of the activity was to make standard 1% solution of glucose in water, and to use this as a control solution.

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Introduction

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. ...read more.

Middle

When heated, the beaker with the water will act as a water bath for the test tube. To heat the beaker, placed it on a tripod and placed it above a Bunsen burner. A few drops of Benedict's Solution were placed into the test tube, and after a while the solution turned yellow. The same process was used to record solutions 'A' and 'B'. The results for all three tests were recorded. Results 1% Glucose solution Test solution A Test solution B Result Solution turned yellow Solution tuned yellow No colour change in solution. Strengths and Weaknesses Strengths Weaknesses This process gives a positive result to justify whether glucose is present or not. The conical flask was not accurate when trying to measure the volume of liquid. (See evaluation) The method to produce a 1% solution of glucose was quite simple. ...read more.

Conclusion

Another problem was that distilled water should have been used, as tap water has various chemicals in it. Alternative Method An alternative method to measure out volumes is to use a volumetric flask, which is extremely accurate. Due to the lack of kit we couldn't get hold of any volumetric flasks, as they are very expensive for each individual student to have. Clinistix could also have been used to test for glucose. Clinistix are thin plastic sticks, which have an end like a matchstick. The end changes colour if there is any glucose in the solution being tested. There is a graph on the side of the tub, which tells you what colour represent, what. These things are used a lot in the real world, as there are diabetics who need to check their sugar level. There are new ways to check, even electronic ways. 1 Motayyab Ramzan10H ...read more.

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