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Measurement in the Laboratory Proper Techniques Explained
Precision Vs. Accuracy Accurate but not precisePrecise but not accuratePrecise AND accurate
Precision Vs. Accuracy
Tools Used in Lab Striker Mortar and pestle Ring stand Beaker Erlenmeyer flask Bunsen burner Clamp Funnel Stirring rod Pipette Tongs Watch glass
Tools for Lab Measurement Ruler Graduated Cylinder Thermometer Two-Pan or Triple-Beam Balance
A Note About Precision You must look at the effective range and increments of measurements on the instrument you are using.
Thermometers What are the increments? How much can you safely estimate?
Pan Balances What are the increments? How much can you safely estimate?
Rulers What are the increments? How much can you safely estimate? A BCDEFGHIJKLMN
Graduated Cylinders What are the increments? How much can you safely estimate?
When using hazardous chemicals, always wear an apron, goggles, and gloves. TRUE.
Laboratory Equipment. Triple beam balance Beaker tongs.
Tools of the Trade Homework and Review Questions.
Lab Equipment. Balance Digital Digital Triple beam Triple beam Measures mass Measures mass Unit is a gram Unit is a gram.
Lab Equipment. Beaker Beakers hold solids or liquids that are unlikely to splatter if heated or stirred. Measures Volume.
Lab Equipment. Familiarize yourself with the following: 1. Know the names of the individual pieces of lab equipment. 2. Know the use of each piece. Note:
Tour of the Lab and Lab Equipment General Chemistry Galax High School Mrs. Parris.
Lab Equipment Science equipment Name: Petri Dish Job: shallow dish used for cultures.
Lab equipment and Lab Safety Think safety with every step you do in the lab!
QUIZ W K 2 S AFETY & M EASUREMENT. Q UESTION 1 What is another name for the metric system? a. the standard system b. the best system c. the SI system.
LABORATORY ACTIVITIES FOR REGENTS CHEMISTRY. Many laboratory activities require measurements. Science uses the S.I. (Metric System) of measurements.
Lab Safety Rules & Procedures 1.No food/drink in the lab area. All you need in lab area: lab instructions, notebook & pen. 2. Safety glasses required for.
Warm –up: What is the density of the block? CUBE DESCRIPTION Material Plastic Length of each side 2 cm Mass 24 grams Weight 6.6 N.
Errors and uncertainties in chemistry internal assessment The consideration and appreciation of the significance of the concepts of errors and uncertainties.
The Highly Effective Teacher ©. K.MD -1. Describe measurable attributes of objects, such as length or weight. Describe several measurable attributes of.
Introduction Unit Lab Safety, Variables and Graphing.
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Volume – amount of space occupied by an object Length – distance between two points Mass – amount of matter in an object Time – period between two events.
What are these pieces of equipment called? Garden sieve Colander Kitchen sieve What are they used for?
Making Measurements in Science The standard system of measurement all scientists use is the METRIC SYSTEM.
Safety in the Lab What is different about this classroom and every other classroom in your school?
1. Neutralization 2. NaOH + HCl H 2 O + NaCl 2NaOH + H 2 SO 4 2H 2 O + Na 2 SO 4 3. Twice as much HCl was required. Because it takes twice as much HCl.
UNIT II.5 Significant Figures. II.5 SIGNIFICANT FIGURES Measuring vs. Counting: Imagine we are picking apples and we count the apples as we go. We can.
CHEMISTRY 11 TODAY’S OBJECTIVE: To learn about the meaning of precision/ accuracy in science and the difference between the two To learn about and how.
Acidity Constant by pH Titration Curves. Quiz Lecture Lab!
Why Weigh by Difference? The amounts of solid samples weighed in this course are generally small. I.e., often 500 mg or less. Analytical balances can.
Measurements in Chemistry Science in Focus, Chemistry OLevel, 2 nd Edition, Chapter 1
Using Metric Tools. 1. Ruler The ruler above has an English side that uses inches and a metric side that uses centimeters. We will only use the metric.
GO TO WEBPAGE…L.G. AND NOTES GO TO UNIT 1 VOCABULARY AND BIG IDEA SHEET.
8-R Common Unit of Measurement 1/1/2014 Questions Note s Big Idea: What are the units of measurement commonly used in science? What is MASS? Definition:
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