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General Chemistry Lab 1111

General Chemistry Lab 1111. Section : 109 – 1:00 to 3:30 pm (Wednesday) 112 – 4:00 to 6:30 pm (Wednesday) 125 – 3:00 to 5:30 pm (Saturday). Instructors & TAs. Section 109 – Dr. Jie Zheng Rodrigo Vinluan (rdv081000@utdallas.edu) Sasha Sun (sxs116020@utdallas.edu)

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General Chemistry Lab 1111

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  1. General Chemistry Lab 1111 Section: 109 – 1:00 to 3:30 pm (Wednesday) 112 – 4:00 to 6:30 pm (Wednesday) 125 – 3:00 to 5:30 pm (Saturday)

  2. Instructors&TAs • Section 109 – Dr. Jie Zheng • Rodrigo Vinluan (rdv081000@utdallas.edu) • Sasha Sun (sxs116020@utdallas.edu) • Section 112 – Dr. Steven Nielsen • Rodrigo Vinluan • Imalka Munaweera (msm110020@utdallas.edu) • Section 125 – Amandeep Sra • Rodrigo Vinluan • Xiaofeng Song (sxx110030@utdallas.edu) • OFFICE HOURS: Sunday 4 – 5 pm in GEMS Center

  3. Syllabus • eLearning • Course Description • Required Books & Materials • Make Up Labs • Penalty Points • Workshop • Lab Assignments • Notebook • Write Ups • Data • Clean Up! • Broken glassware (breakage form to Stockroom) • Grading Criteria • Withdrawal from Class and Religious Holy Days

  4. Safety

  5. Safety Goggles • Gloves • Close-toed shoes • Long pants – no shorts! • No food or drink • Label all glassware • Work under the fume hood • Never put chemicals directly on a balance!

  6. Safety (continued) • Know the location of safety equipment • Safety shower • Fire extinguisher • Eyewash • First Aid kit • Dispose broken glass in a proper container • Dispose chemicals/wastes properly • Wash hands

  7. Safety(continued) • http://vimeo.com/8703102

  8. Experiment 1: Basic Lab Operations A) Measurements B) Significant Figures C) Reading a Meniscus

  9. Experiment 1: Basic Lab Operations (continued) A) Measurements • Mass • Balances • Volume • Pipettes and pipette bulbs

  10. Experiment 1: Basic Lab Operations (continued) B) Significant Figures Rules 1) ALL non-zero numbers (1,2,3,4,5,6,7,8,9) are ALWAYS significant. (i.e. 12,345 = 5 sigfigs) 2) ALL zeroes between non-zero numbers are ALWAYS significant. (i.e. 1001 = 4 sigfigs) 3) ALL zeroes which are SIMULTANEOUSLY to the right of the decimal point AND at the end of the number are ALWAYS significant. (i.e. 0.0100 = 3 sigfigs) 4) ALL zeroes which are to the left of a written decimal point and are in a number >= 10 are ALWAYS significant. (i.e. 100. = 3 sigfigs)

  11. Experiment 1: Basic Lab Operations (continued) B) SigFigs Examples Number#Significant Figures 12,435 5 100.5 4 0.0020 2 1.00000 6 4,000,000 1 0.0100 3

  12. Experiment 1: Basic Lab Operations (continued) • B) Sig Figs When adding or subtracting your answer can only show as many decimal places as the measurement having the fewest number of decimal places. Ex. 3.76 + 14.83 + 2.1 20.69  20.7 When multiplying or dividing, your answer may only show as many significant digits as the multiplied or divided measurement showing the least number of significant digits. Ex. 31 x 21 = 651  6.5 x 102 or 650 100.0/1.0 = 10  10.

  13. Experiment 1: Basic Lab Operations (continued) C) Reading a Meniscus Meniscus is the curve in the upper surface of a standing body of liquid to the surface of the container or another object. A:concave B: convex

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