Unformatted text preview: (NH 4 ) 2 Cr 2 O 7 in this solution. (b) The student then pipets 50.00 ml of the (NH 4 ) 2 Cr 2 O 7 solution made above in part (a) into a 250.0 ml volumetric flask and adds distilled water to the mark. Calculate the molarity of (NH 4 ) 2 Cr 2 O 7 in this diluted solution. 3. Explain the purpose of starch in this experiment. 4. According to the lab manual, there are two things that you should not do when using a pipet because they could result in a serious injury. (a) What are the two things you should not do when using a pipet? (b) Why could doing either of these things cause an injury? (c) What is the proper technique for using a pipet correctly and safely? 5. Look up the MSDS for sodium hypochlorite. What should you do if some bleach solution spills on your hands?...
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This document was uploaded on 10/26/2011 for the course CHEM 207 at Cornell.
- Fall '07