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Analysis of Sweets. Is it possible to find any of the substances(Starch,Gelatin, Sucrose/Glucose) in any of the different candy samples?

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IB Chemistry: Analysis of Sweets IB Name: klassa andersen 16/9-11 Design: Aim: Is it possible to find any of the substances(Starch,Gelatin, Sucrose/Glucose) in any of the different candy samples? Variables: None Independent variable: None Controlled variable: None Dependant variable: None Materials: * Heater * Copper Sulfate (CuSO4 )(0,1M) * Sodium Hydroxide (NaOH) (2 M) * Beaker (25 ml) * Waterglass * Three different Candy samples(2: Gumdrops,4:Cola Straps,9:Winegum) * Iodide * Water (H2O) Method: 1. Cut the three different samples of candy into small pieces 2. Put small pieces of the different samples of the candies into three watchglasses 3. ...read more.


Add small amounts of CuSO4 and then NaOH 9. Check to see if the samples have a purple color which means that the sample of the candy contains gelatin 10. To find out if the any of the three different samples of candy contain any Sucrose/glucose you put the samples containing gelatin into a heater 11. If any of the three different samples have a yellowish color, then the contain Sucrose/glucose. Data Collection and Processing: Table 1(Showing the Results of the tests): Lab 1: (Substances): Sample 2 (Gumdrops): Sample 4 (cola straps): Sample 9(Winegum): Starch: Yes Yes No Gelatin: Yes No No Sucrose/Glucose: No Yes Yes Conclusion and Evaluation: Conclusion: From the experiment we researched, we ...read more.


Evaluation: The experiment went well, however they were some weaknesses in the experiment. One of the weaknesses was that we didn't have any specific materials that could actually measure the amount of each substance, which meant that we could only observe and see if the substances could be found in the samples from human eye, which makes it's a little uncertain if there is any substances from the samples or not. The errors above can be improved by; 1. Repeating the experiment 2. Using better materials for more accurate amounts of the substances from the samples 3. Reducing Human errors (Putting too much off the materials to find the substances etc.) By doing this above, the experiment will improve. ...read more.

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