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Your Name Mr.Trimble Chemistry Period #

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Presentation on theme: "Your Name Mr.Trimble Chemistry Period #"— Presentation transcript:

1 Your Name Mr.Trimble Chemistry Period #

2 1 Table of Contents Exp # Title of Experiment Pages Score 1 Accuracy and Precision 5-

3 BASIC INSTRUCTIONS FOR LABORATORY WORK
Read the assignment before coming to the laboratory. Prepare your lab book for collecting data before coming to the laboratory. ALWAYS put on your goggles before going to your assigned bench. NEVER remove your goggles until your bench is cleared and cleaned. NEVER eat or drink in the lab. Avoid directly inhaling any gaseous substance produced or used in the laboratory. Work independently. Record your measurements directly into your notebook, NEVER transfer data from another piece of paper. ALWAYS attend your Bunsen burner. Work conscientiously to avoid accidents. Use only the amounts of chemicals called for; improper dispensing of chemicals is wasteful and potentially dangerous. Always add concentrated ACID TO WATER. Dispose of excess liquid reagents and solutions by pouring them down the sink and rinsing them away with copious amounts of water. Dispose of solids in the correctly labeled container in the hood. Do not place reagent bottle lids or stoppers on the lab table. Hold them in your hand while dispensing the desired amount of the chemical. Always return a dropper to its original container. NEVER pipet by mouth. Use distilled water when making reaction mixtures or solutions, tap water for controlled temperature baths and washing glassware. KEEP YOUR BENCH TOP CLEAN. ALWAYS use the right tool for the right job. KNOW THESE GLASSWARE ITEMS: beaker, Florence flask, Erlenmeyer flask, round bottom flask, test tube, graduated cylinder, buret, pipet, volumetric flask, side arm flask, crucible, evaporating dish, watchglass. NEVER use dirty or chipped glassware. When weighing ALWAYS use a weigh boat or weighing paper. Do not weigh hot objects.

4 3 SI Units Metric Prefixes Giga (G) 109 Mega (M) 106 Kilo (K) 103
Length: meter (m) Energy: Joule (J) Mass: kilogram (kg) Time: seconds (s) Volume: liter (L) Temperature: Kelvin (K) Pressure: kilopascal (kPa) Amount of substance: mole (mol) Metric Prefixes Giga (G) 109 Mega (M) 106 Kilo (K) 103 Hecta (H) 102 Deka (D) 101 Base deci (d) 10-1 centii (c) 10-2 milli (m) 10-3 micro (µ) 10-6 nano (n) 10-9 pico (p) 10-12

5 1.centimeter ruler .1 cm +/- .01 cm 2. 100 mL g.c. 1 mL +/- .5 mL
Measuring Tool Smallest division Uncertainty/unit 1.centimeter ruler cm /- .01 cm mL g.c mL /- .5 mL 3. thermometer oC /- .1 oC 4. digital pan balance / g


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