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CHEM 1111 General Chemistry I Laboratory

CHEM 1111 General Chemistry I Laboratory. Fall 2011 TA: Elizabeth Braun CHEM 1111.110. Contact Information. Elizabeth Braun ein100020@utdallas.edu Office Hours: Wednesday 11:00am-12:00pm GEM Center. Syllabus Safety Lab Set Up Workshop Assignment of Drawers. Significant Figures.

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CHEM 1111 General Chemistry I Laboratory

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  1. CHEM 1111General Chemistry I Laboratory Fall 2011 TA: Elizabeth Braun CHEM 1111.110

  2. Contact Information • Elizabeth Braun • ein100020@utdallas.edu • Office Hours: • Wednesday 11:00am-12:00pm • GEM Center

  3. Syllabus • Safety • Lab Set Up • Workshop • Assignment of Drawers

  4. Significant Figures • Non-zero integer values always count 9,463.721 7 Significant Figures 2. Zeros between non-zero integers always count 109,034.81 8 Significant Figures

  5. Significant Figures • Leading zeros never count 0.000052 2 Significant Figures 4. Trailing zeros always count in the presence of a decimal point. 0.0708100 6 Significant Figures

  6. Significant Figures 5. When using multiplication or division, the final number of significant figures is determined by the measured number with the smallest number of significant digits. Measured Values: 230.1 g, 230.14g, 230 g. The result has 3 Significant Figures

  7. Significant Figures 6. When using addition or subtraction the final number of decimal places is determined by the measured value with the smallest number of decimal places. Measured Values: 14.57 mm, 16.021 mm, 15.9 mm The result has 1 significant digit after the decimal

  8. Practicing Significant Figures 1,984.200 7 Significant Figures 0.002316 4 Significant Figures 1.22300 x 10-4 6 Significant Figures

  9. Reading a Meniscus • http://www.youtube.com/watch?v=D_g0U3vxr18&feature=related http://morrisonlabs.com/meniscus.htm

  10. Reading a Meniscus Practice 6.62 mL http://morrisonlabs.com/selfcheck662answer.htm

  11. Reading a Meniscus Practice 11.5 mL http://morrisonlabs.com/selfcheckansw115ml.htm

  12. Reading a Meniscus Practice 52.8 mL

  13. In Lab Protocol • Place Personal Items on Shelf • Keep goggles, notebook, lab handout • Drawer Assignments • Safety Procedures • Equipment Check-in • Demonstrations

  14. Questions?

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