Pre-lab Quiz#10 - Score: 1/1 3. Qualitative Plot What can...

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1. Hydrogen Peroxide   o-danisidine is oxidized to a colored compound by H 2 O 2 . Where does the H 2 O 2  come from?    Student Response Value Correct Answer Feedback 1.  It is reduced from  oxygen by glucose. 100%       2. It is added directly as  a reactant, dissolved  in H 2 SO 4 . If it were  concentrated enough,  it would be called  piranha solution.      3. It is oxidized from  water by glucose and  glucose oxidase.      4. It is generated  photochemically from  o-dianisidine.      Score: 1/1    2. Practicality   The glucose determination in this lab takes approximately 45 minutes. Test strips in common glucose meters  work in less than 1 minute. What is different in the real world instruments? 
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Unformatted text preview: Score: 1/1 3. Qualitative Plot What can be learned from the qualitative plot supplied as a spreadsheet to be fit as a pre-lab exercise? Score: 1/1 4. Spectrophotometer Blanking As with every absorption measurement, the spectrophotometer must be "blanked," i.e. standardized for 100% T. How should this be done? Score: 1/1 5. Temperature Suppose the lab is at 23C while you are making your working curve, but then the heating system turns on and the temperature in the lab rises to 30C. What will happen? Score: 1/1...
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This note was uploaded on 01/06/2011 for the course CHEM 223 taught by Professor Scheeline during the Fall '08 term at University of Illinois at Urbana–Champaign.

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Pre-lab Quiz#10 - Score: 1/1 3. Qualitative Plot What can...

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