8. a) Four solutions were made up; one eontaining glucose, onecontaining starch, one containing amylase (a starch digestingenzyme) and one containing sucrose. Unfortunately, theywere not labelled, except as solutions A, B, C and D. Thefollowing tests were carried out to identify the solutions.All solutions were tested with Biuret reagentSolution C turns purpleSolutions A, B and D remain blueSolutions A, B and D tested with Benedict's solutionSolutions A and B remain blueloSolution D turns redSolutions A and B incubated withSolution C and then retested withBenedict's solutionSolution B turns redSolution A remains blueIdentify, with reasons, the four solutions.

4 Different solutions A, B, C and D: 1. Glucose 2. Starch 3. Amylase (an enzyme) 4. Sucrose Biuret…

8. a) Four solutions were made up; one containing glucose, one containing starch, one containing amylase (a starch digesting enzyme) and one containing sucrose. Unfortunately, they were not labelled, except as solutions A, B, C and D. The following tests were carried out to identify the solutions. All solutions were tested with Biuret reagent cart offoege delt eqansi Solution C turns purple Solutions A, B and D remain blue Solutions A, B and D tested with Benedict's solution Solutions A and B remain blue Solution D turns red Solutions A and B incubated with Solution C and then retested with Benedict's solution Solution B turns red Solution A remains blue Identify, with reasons, the four solutions.

8. a) Four solutions were made up; one containing glucose, one containing starch, one containing amylase (a starch digesting enzyme) and one containing sucrose. Unfortunately, they were not labelled, except as solutions A, B, C and D. The following tests were carried out to identify the solutions. All solutions were tested with Biuret reagent cart offoege delt eqansi Solution C turns purple Solutions A, B and D remain blue Solutions A, B and D tested with Benedict's solution Solutions A and B remain blue Solution D turns red Solutions A and B incubated with Solution C and then retested with Benedict's solution Solution B turns red Solution A remains blue Identify, with reasons, the four solutions.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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A student carried out an experiment trying to prepare tetra-methyl-ammonium tri-iodide.The student weighed 1.13 g tetra-methyl-ammonium iodide into a beaker containing 25 mL ethanol, and then added 1.57 g of iodine. The mixture was heated gently, whilst stirring, on a hotplate until tetra-methyl-ammonium iodide, a white powder, was completely dissolved. After the mixture was allowed to cool down to room temperature, the mixture was further cooled on ice. After filtration on a Buechner funnel, washing with diethyl ether and leaving it under vacuum suction for a couple of minutes, the student recovered the product and weighed it. The mass of the obtained tetra-methyl-ammonium triiodide was 1.62 g.What is the yield of the reaction in percent [%]? For the calculation, assume that the product is completely dry and pure, so there are no impurities like side-products, unreacted educts, or solvent residues.