After completing the course, student will
- execute the procedure of a textbook laboratory experiment with attention to accuracy, proper procedure and health & safety
- be able to collect relevant data and make careful, appropriate observations during the execution of the experiment
- be able to interpret the data for the purpose of completing calculations and answering questions on the laboratory report sheet
COURSE OBJECTIVES
- Chemistry 1151L laboratory manual
- Safety glasses
- Scientific calculator
- Laptop computer
COURSE MATERIALS
- Attendance is mandatory
- There are no provisions for make-up labs
- Missing classes for more than three times is an automatic failure
- Absenting oneself and copying data from a lab partner is NOT allowedAll parties involved in such acts will be penalized
ATTENDANCE POLICY
- Carefully read through the course syllabus and safety rules before labs begin
- Every student must print and sign the lab safety and lab waiver forms before labs begin
- Forms and more information can be found athttp://a-s.clayton.edu/Chemistry/CHEM1151L/chem1151Lhome.htm
- Before coming to each class, carefully read objectives and procedure of the experiment to be conducted
- Record all data and observations during experiment and use that to complete laboratory reports
GENERAL RESPONSIBILITIES
- All laboratory reports should be typed using Word and printed
- All graphs should be plotted using Excel and printed
- Only hard copies are accepted
- Hand written reports will not be accepted
In case of a printing problem- Students may email completed reports to the instructor
just to prove completion- Hard copies have to be submitted later
- Changes cannot be made to the reports after emailing or else the report will be considered late
LABORATORY REPORTS
- Data sheets used for completing reports can be found athttp://a-s.clayton.edu/Chemistry/CHEM1151L/chem1151Lhome.htm
- These data sheets are also included in the laboratory manual
- Students are required to complete all tables of data, observations, calculations, and all the questions that follow
- Laboratory reports are due in one week (just before the next class begins)
- Reports submitted during or after the class are considered late
- Late reports incur a penalty of 10% per day
- No reports are accepted after the last day of classes
LABORATORY REPORTS
- Carefully observe all safety rules since it is a major concern at all times
- Materials Safety Data Sheets (MSDS) are available in the labs and give important information on the properties of chemicals
- All containers are labeled with the National Fire Protection Association (NFPA) safety diamonds that show the type and degree of
a chemical hazard
- The safety diamond is color coded as shown on the next slide
GENERAL LAB SAFETY
- The white gives special information such as water or oxidizer incompatibility
- The degree of hazard is rated from 0 to 4 0 indicates no significant hazard and 4 is the greatest hazard
GENERAL LAB SAFETY
Students may lose points if the following safety rules are not observed
- Always come to the lab early (about 5 minutes to time) and prepared
- Students must be present during the pre-lab lecture which is given at the beginning of each class
- Students who miss pre-lab lecture may not be allowed to do the experiment and will obtain a zero for that lab report
- Goggles must be worn at all times
- Dress, skirts, or shorts above the knee are NOT allowed. However, students may cover these with a suitable lab coat or apron
GENERAL SAFETY RULES
Students may lose points if the following safety rules are not observed
- Closed-toed shoes must be worn at all times(No open-toed shoes, sandals, slippers, high-heeled or woven shoes)
- Loose sleeves must be folded to prevent dipping in chemicals
- Long hair must be tied back and out of the way
- No eating, drinking or smoking in the lab
- No chewing of gum in the lab
- Do not wear eye contacts to the lab
GENERAL SAFETY RULES
Students may lose points if the following safety rules are not observed
- Do not sit on lab benches
- Put all broken or chipped glass in the broken glass container (not trash can)
- Do not pick up broken pieces with bare hands (use broom or hard gloves)
- No horse play is tolerated in the lab
- No unauthorized experiments are allowed (ask instructor for any clarifications)
GENERAL SAFETY RULES
Students may lose points if the following safety rules are not observed
- All book bags should be placed or hanged in one corner of the lab
- Book bags may also be put in cabinets
- Lab floor (aisles) must be free of bags
- Only notebooks, pens/pencils, calculators, and laptops are allowed to be placed on lab benches
REPORT ALL ACCIDENTS, HOWEVER MINOR, TO THE INSTRUCTOR
GENERAL SAFETY RULES
- Avoid direct contact with chemicals
- Avoid touching your face with your hands while in the lab
- In case of skin exposure to chemicals wash off immediately with lots of water
- Always wash your hands very well with soap before leaving the lab
EXPOSURE TO CHEMICALS
Body Contact with Chemicals- Safety showers (located at the corners of the labs) may be used
- Remove clothing if appropriate
Face Contact with Chemicals- Wash face using eyewash fountain for about 15 minutes
- Do not take off goggles
Eye Contact with Chemicals- Remove goggles
- Use fingers to prop eyelids open - Rinse with eyewash fountain for about 15 minutes
- If only one eye is affected, do not rinse both
SAFETY SHOWER AND EYEWASH
- Do not smell chemicals unless instructed to do so
- Never taste chemicals
- Do not pipette chemicals by mouth
- Never remove chemicals from the lab
- Use fume hoods when directed to do so
- Always place chemicals and equipment as far back as possible
HANDLING CHEMICALS
- Carefully read labels on all bottlesFor example: do not mistaken 0.1 M HCl for 1.0 M HCl
- Label all reagents stored in beakers, bottles, or test-tubes
- Never return unused chemicals to the original container
- When diluting solutions add acid/base to water but not water to acid/base
HANDLING CHEMICALS
- Heating may be done with hotplates or Bunsen burners
- Do not heat or cool a closed container
- Point opening of test-tube or flask away from yourself and others while heating
- Do not heat or cool volumetric glassware
- Do not pick up hot objects with bare hands (use tongs)
- Do not hand hot objects to the instructor
- Do not use thermometers as stirring rods
HEATING OR COOLING
- Turn on a bit earlier than when needed to save time
- Do not touch with bare hands
- Turn off immediately after using
- Allow to cool before returning to the shelves
HOTPLATE
- Make sure there are no flammable substances present
- Be cautious of long hair and loose clothing
- Never leave burner on unattended
- Turn on when needed and turn off immediately when finished
- Make sure gas valve is tightly closed
BUNSEN BURNER
Bunsen Burner
Bunsen Burner connected toGas Valve (Valve off)
Gas Valve
Bunsen Burner connected toGas Valve (Valve on)
- Use fume hoods whenever directed to do so
- Place chemicals and equipment as far back as possible(At least 4 inches away from the front)
- Slide hood door as far down as possible
- Make sure hood is turned on
FUME HOODS
- Keep the mass balance and the area clean at all times
- Use the brushes available to clean up after use
- Put all used weighing papers/boats in the trash can
- When massing, record all digits and never round off
MASS BALANCE
- Know locations of all exits(center windows of C48 and C54 are emergency exits)
- Know locations and use of safety equipment (fire extinguisher, showers, eyewash fountains, fire alarm, first aid kit)
- In the event of fire, turn off equipment & gas line and then exit
If your clothing catches fire- Use safety showers
- Roll on the floor if shower is not close by- Shout to get attention of others
REMEMBER REPORT ALL ACCIDENTS, HOWEVER MINOR, TO THE INSTRUCTOR
IN CASE OF EMERGENCY
- Turn off all equipment (including water taps, gas line, vacuum line)
- Return all equipment and items to their respective shelves
- Wash all used glassware with soap, rinse with water, and return to storage shelves or drawers
- Clean the lab bench and the hood where you worked
- Do not leave glassware, chemicals or bottles on your bench or by the sink
- Last but very importantWash your hands with soap before leaving the lab
BEFORE LEAVING THE LAB