CH202 Prelab Skills Test

# CH202 Prelab Skills Test - CH202 Prelab Skills Test

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CH202 Prelab Skills Test (Skills Test Prelab) SCHNELL ZACHARY EUGENE CH202, section 005, Fall 2008 Instructor: weiming zheng TA Web Assign Current Score: 19 out of 20 Due: Monday, September 8, 2008 11:00 PM EDT Description This prelab will count for 20% of your Skills Test score. To complete this assigment AND to prepare for the laboratory portion of the Skills Test, you should carefully review the following two sources. The sections on the Analytical Balance and Volumetric Glassware (pp. xxxi - xxxix) in the Introductory Material of your CH 202 Lab Manual. The three videos listed under Solutions on the Hayden McNeil website at http://www.ncsu.hmpublishing.biz/ . In the skills test, you will be asked to prepare two solutions: 1) Prepare a blue dye solution by diluting a stock solution. This will involve using the formula C 1 V 1 = C 2 V 2 to calculate the proper amount of stock solution. You will also be tested on the proper use of the pipet and volumetric flask. 2) Prepare a Cu 2+ solution from a solid containing Cu 2+ . You will need to use the formula g Cu 2+ = X M target solution * (Y L volumetric flask) * (Z g solid / 1 mol solid) , assuming that one mole of Cu solid contains one mole of Cu 2+ . You will also be tested on the proper use of the analytical balance and volumetric flask. The due date for this assignment is past. Your work can be viewed below, but no changes can be made. Request Extension 1. 1/1 points How many grams (to the nearest 0.1 g) of Fe(NO 3 ) 3 ·9H 2 O are required to prepare 300.0 mL of a 0.244 M solution of Fe(NO 3 ) 3 ·9H 2 O? 29.6 29.6 g Fe(NO 3 ) 3 ·9H 2 O CH202 Prelab Skills Test http://www.webassign.net/v4cgizeschnel@ncsu/student.pl?k=200812071. .. 1 of 8 12/7/2008 2:35 PM

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2. 1/1 points What is the molarity (to three decimal places) of the resulting solution when 25.852 grams of Mn(ClO 4 ) 2 ·6H 2 O are added to 550.0 mL of water? .130 0.130 M 3. 0/1 points How many milliliters (to two decimal places) of a 0.805 M H 2 SO 4 solution must be used to make 250.0 mL of a 0.197 M H 2 SO 4 solution? 61.80 61.18 mL 4. 1/1 points If 8.80 mL of a 1.684 M KMnO 4 solution are diluted to a final volume of 75.0 mL, what is the resulting molarity (to 3 decimal places)? .198 0.198 M 5. 1/1 points In the video entitled "Dissolving a Solid in a Volumetric Flask" under Solutions, Lindsey demonstrates a quantitative transfer. Select all of the following that are important to achieve a quantitative transfer when adding a solid to a volumetric flask. Making sure that no solid is spilled when pouring it from the weighing beaker through the paper funnel. Rinsing the weighing beaker with deionized water or the solvent being used
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## This note was uploaded on 02/03/2009 for the course CH CH 102, 20 taught by Professor Ta,ta,sandberg during the Fall '08 term at N.C. State.

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CH202 Prelab Skills Test - CH202 Prelab Skills Test

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