Podcast
Questions and Answers
What is the primary responsibility of a chemistry student working in a laboratory?
What is the primary responsibility of a chemistry student working in a laboratory?
What should you do before starting a practical exercise in the chemistry laboratory?
What should you do before starting a practical exercise in the chemistry laboratory?
What type of bonds are chemical compounds formed from?
What type of bonds are chemical compounds formed from?
What should you do when handling chemicals in the laboratory?
What should you do when handling chemicals in the laboratory?
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What should you do with lab waste in the chemistry laboratory?
What should you do with lab waste in the chemistry laboratory?
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What is the primary material used to make most laboratory tools?
What is the primary material used to make most laboratory tools?
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What is the main purpose of a graduated cylinder?
What is the main purpose of a graduated cylinder?
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What is the function of a burette?
What is the function of a burette?
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What is the purpose of a spatula?
What is the purpose of a spatula?
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What is the primary use of a watch glass?
What is the primary use of a watch glass?
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Study Notes
Laboratory Safety
- Chemistry laboratory contains inherent dangers and hazards, and it's the student's responsibility to work safely to prevent injury to themselves and others.
- Before starting an experiment, read the protocol from the manual carefully, ensure all reagents and glassware are available, and follow special rules.
Safety Rules in Laboratory
- Wear a lab coat and close all buttons.
- Put on a face mask and gloves.
- Read the Chemical Safety Information.
- Know emergency exit routes.
- Know the locations of laboratory safety showers, eyewash stations, and fire extinguishers.
- Avoid skin and eye contact with all chemicals.
- Check the label on the bottles before taking the substance from them.
- Keep inflammable substances away from flame.
- Assume that all chemicals are highly toxic.
- Don't eat or drink in the laboratory.
- Don't taste or sniff chemicals.
- Do not pipette by mouth - ever.
- Dispose of lab waste properly.
Chemicals and Bonds
- Chemicals are compounds formed by two or more atoms linked by chemical bonds (ionic, covalent, or polar covalent).
- 106 atoms combine according to definite rules to form millions of molecules.
Laboratory Tools
- Test tube: a glass tool with an open top used for testing and small reactions.
- Beaker: a device used to transfer small quantities of liquids.
- Flask: includes two types (volumetric and conical) used for solution preparation.
- Dropper: a device used to transfer small quantities of liquids.
- Graduated Cylinder: a glass tool with numbers on the side, used to take volumes for preparation.
- Burette: a graduated long glass tube with a tap at one end, used for delivering known volumes of liquid in titrations.
- Micropipette: a small piece used to transfer small quantities of liquids.
- Spatula: a small tool made of stainless steel, used for transferring solids.
- Test tube rack: a plastic or metal rack containing circular holes, used to carry test tubes.
- Funnel: a special type of funnel used in lab for transferring liquids.
- Watch glass: a circular concave piece of glass used for evaporating a liquid, holding solids while being weighed, and heating a small amount of substance.
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Description
Learn how to handle chemical materials, equipment, and machines safely and efficiently in a laboratory setting. Understand the hazards and dangers in a chemistry lab and how to prevent injuries.
