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

Instructors & TAsSection 109 – Dr. Jie Zheng

Rodrigo Vinluan (rdv081000@utdallas.edu)Sasha Sun (sxs116020@utdallas.edu)

Section 112 – Dr. Steven NielsenRodrigo VinluanImalka Munaweera (msm110020@utdallas.edu)

Section 125 – Amandeep SraRodrigo VinluanXiaofeng Song (sxx110030@utdallas.edu)

OFFICE HOURS: Sunday 4 – 5 pm in GEMS Center

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

Safety

Safety GogglesGlovesClose-toed shoesLong pants – no

shorts!No food or drinkLabel all glasswareWork under the fume

hoodNever put chemicals

directly on a balance!

Safety (continued)Know the location of

safety equipmentSafety showerFire extinguisherEyewashFirst Aid kit

Dispose broken glass in a proper container

Dispose chemicals/wastes properly

Wash hands

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

Experiment 1: Basic Lab OperationsA) MeasurementsB) Significant FiguresC) Reading a Meniscus

Experiment 1: Basic Lab Operations (continued)A) Measurements

MassBalances

VolumePipettes and pipette

bulbs

Experiment 1: Basic Lab Operations (continued)B) Significant Figures Rules1) 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)

Experiment 1: Basic Lab Operations (continued)B) SigFigs ExamplesNumber #Significant Figures12,435 5100.5 40.0020 21.00000 64,000,000 10.0100 3

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 20.7When 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.

Experiment 1: Basic Lab Operations (continued)C) Reading a

MeniscusMeniscus 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