Lab_web_quiz_10

Lab_web_quiz_10 - Web Quiz You can login to this page...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Web Quiz You can login to this page multiple times but you cannot take the quiz more than once. . Submit your answer for grading by Clicking on the "Grade Answers" button at the bottom of the page only when you are sure of your answers. Question # 1 In the electrolysis of aqueous NaCl, how many liters of Cl 2 ( g ) (at STP) are generated by a current of 7.50 A for a period of 100. min? A. 45000 L B. 0.466 L C. 0.233 moles of Cl 2 , but more information is needed to determine the volume D. 5.22 L E. 10.4 L Question # 2 Copper is electroplated from CuSO 4 solution. A constant current of 4.00 amp is applied by an external power supply. How long will it take to deposit 1.00 x 10 2 g of Cu? The atomic mass of copper is 63.546. A. 21.1 h B. 10.0 min C. 1.60 days
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
D. 11.2 s E. 2.91 h Question # 3 An electrolytic cell is set up for the production of aluminum, which involves the reduction of Al 3+ to Al. The external source passes a current of 11.2 A through the cell with an emf of 6.0 V. How long does it take for the cell to produce a pound (454 g) of aluminum metal? A. 40 hr B. 121 hr C. 3.26 x 10 3 hr D. 1.35 x 10 3 hr E. 226 hr Question # 4 An antique automobile bumper is to be chrome plated. The bumper, which is dipped into an acidic Cr 2 O 7 2-
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/05/2010 for the course CHEM 105B taught by Professor Bau during the Spring '08 term at USC.

Page1 / 10

Lab_web_quiz_10 - Web Quiz You can login to this page...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online