1. 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) General Chemistry Lab 1111

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 12,4355 100.54 0.00202 1.000006 4,000,0001 0.01003

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 10 2 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