Laboratory Skills Chapter 2: Background.

Slides:



Advertisements
Similar presentations
STARTER Put this number in scientific notation.
Advertisements

Basic Laboratory Skills
Important Topics Added to Chapter 1
Types of Numbers (Data)
Activity 2.3: Kool-Aid Column Chromatography
Scientific Measurement What is measurement… What is measurement… Measurement is a quantity that has both a number and a unit. Measurement is a quantity.
CHM 101/102 Laboratory Manual Significant Figures and Density General Chemistry 101/102 Laboratory Manual University of North Carolina at Wilmington.
Chapter 2: Scientific Measurement Ms. Campos
LABORATORY NOTEBOOK. Organization of lab notebook/binder Keep a table of contents at the beginning of the binder (about 2 pages) For each lab, start with.
Advanced Placement Chemistry Significant Figures Review AP Chemistry
Laboratory Glassware and equipment lab 2
The Mathematics of Chemistry Significant Figures.
Periodic Trends in Density Required Laboratory Skills.
Laboratory Concepts Dani Klingert. Accuracy When titrating, rinse the buret with the solution to be used in the titration instead of with water. If you.
Chapter 3 Scientific Measurement
POWERPOINT THE SECOND In which you will learn about: Scientific notation +/-/x/÷ with sig figs Rounding.
Objective of the day: To understand how to measure using a graduated cylinder, triple beam balance and a ruler.
Data analysis (chapter 2) SI units and the metric system ▫Base units  Time (sec)  Length (m)  Mass (kg)  Temperature (Kelvin)  Derived base units.
Accuracy, Precision, Signficant Digits and Scientific Notation.
Aim: How can we perform mathematical calculations with significant digits? Do Now: State how many sig. figs. are in each of the following: x 10.
IN THE CHEMISTRY SECTION OF YOUR NOTEBOOK, TAKE CORNELL STYLE NOTES OVER THE INFORMATION PRESENTED IN THE FOLLOWING SLIDES. Measurements in Chemistry Aug.
The Scientific Method 1. Using and Expressing Measurements Scientific notation is written as a number between 1 and 10 multiplied by 10 raised to a power.
Chapter 3 Scientific Measurement Pioneer High School Mr. David Norton.
SIGNIFICANT FIGURES. ACCURACY VS. PRECISION  In labs, we are concerned by how “correct” our measurements are  They can be accurate and precise  Accurate:
Measuring and Units.
Welcome to Chemistry 116! Lab Safety and Proper Procedures Labs 1.
Significant Figure Notes With scientific notation too.
Chapter 2 Section 3 Using Scientific Measurements.
Do Now Take a copy of the worksheet Organizing Data from the front desk. Bring it back to your seat and work on it for the first 10 min. of class.
MEASUREMENTS. EXACT NUMBERS! Numbers determined by counting or by definition Ex: 6 apples, 1 teacher 1 inch=2.54 cm.
Introductory Chemistry: Concepts & Connections Introductory Chemistry: Concepts & Connections 4 th Edition by Charles H. Corwin Scientific Measurements.
Solutions & Solubility
3.1 Measurement and Uncertainty How do you think scientists ensure measurements are accurate and precise?
Math and Measurement. Significant Figures Significant Zeros 1.Leading zeros are never significant 2.Trailing zeros only count if there’s a decimal point.
Percent Composition. Molar Mass Calculate the Molar Mass of H 2 O 1 mole of H 2 O contains 2 mols H and 1 mol O. The mass of 2 moles H = 2 mol(1.008 g/mol)=
Volumetric Analysis Topic 8.4 Titration readings in a normal titration you are usually advised to carry out at least one rough and two accurate.
Measurements in Chemistry Aug 6, 2014 In the chemistry section of your notebook, Take Cornell style notes over the information presented in the following.
Accuracy vs. Precision Measurements need to accurate & precise. Accurate -(correct) the measurement is close to the true value. Precise –(reproducible)
Chemistry by the numbers Units of Measurement – The Metric System Length: Mass: Volume: Temperature: Pressure: milli-centi-deci-(unit)deka-hecta-kilo-
Measurements. What do we measure? Fundamental properties Fundamental properties mass (weight)kilogram mass (weight)kilogram lengthmeter lengthmeter timesecond.
The Science of Chemistry Measurement. Introduction When you hear the term chemistry, what comes to mind??? What do you think we are going to study?? Choose.
INTRODUCTORY CHEMISTRY INTRODUCTORY CHEMISTRY Concepts and Critical Thinking Seventh Edition by Charles H. Corwin PSS Lecture © 2014 Pearson Education,
Solutions & Solubility Solution Preparation by dilution.
Data Analysis Applying Mathematical Concepts to Chemistry.
To understand how to measure using a graduated cylinder, triple beam balance and a ruler Objective of the day:
LABORATORY GLASSWARE AND EQUIPMENT LAB 2. Welcome Welcome to the chemistry lab! Chemistry is a lot of fun, but can be even more so if you are familiar.
Significant Figures and Scientific Notation. What is a Significant Figure? There are 2 kinds of numbers:  Exact: the amount of money in your account.
Physics Problem Solving  Objectives  Systematic Approach  Prefix Conversion  Dimensional Analysis  Significant Figures  Precision & Accuracy  Error.
LABORATORY GLASSWARE AND EQUIPMENT LAB 2. Welcome Welcome to the chemistry lab! Chemistry is a lot of fun, but can be even more so if you are familiar.
Scientific Measurement Chapter 3. Not just numbers Scientists express values that are obtained in the lab. In the lab we use balances, thermometers, and.
Unit 0: Working as a Scientist – Significant Figures AGENDA: DO NOW NOTES WHITE BOARDING LAB GOAL: I can properly record and calculate data with proper.
LABORATORY SAFETY Keep all books, backpacks, coats, etc. off of the lab benches No eating or drinking in the lab room Wear goggles and covered shoes at.
SI (International/Metric System) of Units Universally accepted way to measure things Based off of the number 10 Conversions can be done easily.
Christopher G. Hamaker, Illinois State University, Normal IL © 2008, Prentice Hall Chapter 2 Scientific Measurements INTRODUCTORY CHEMISTRY INTRODUCTORY.
Significant Figures Show the Uncertainty in Measured Data
Uncertainty in Measurements
Scientific Investigation. Safety: 1.What is a fume hood used for? 2.What are 3 precautions you should take when handling chemicals? 3.What is an SDS?
Part 2 Significant Figures with Calculations
Unit 1 Chapter 2 Pages
Learning Targets I can use correct numbers of significant figures and units in both measurements and calculations. I can accurately measure mass and volume.
Significant Figures Sig Figs.
Laboratory Glassware and equipment
Significant Figures Show the Uncertainty in Measured Data
Your Name Mr.Trimble Chemistry Period #
Unit 1 The Math of Chemistry.
LABORATORY and SAFETY EQUIPMENT AND THEIR FUNCTIONS
Lab Safety Equipment Ms MacCormack Fall 2018.
Lab Equipment.
Preparing Solutions.
Chemistry Measurement Notes
Presentation transcript:

Laboratory Skills Chapter 2: Background

Laboratory Safety Personal protective equipment (PPE) Safety cabinets Glasses vs. goggles Gloves Lab coat Face shields Safety cabinets Location and function of Gas shutoffs Fire extinguishers Fire blankets Eyewash/shower

Laboratory Notebooks Importance of recording actual data as it happens Format Purpose

Laboratory Notebooks What to include Numbered procedures Tables Calculations with all math and units displayed Sketches, model numbers, etc. Signatures To and from pages

Equipment Graduated cylinders

Equipment Volumetric flasks

Equipment Serological pipets

Equipment Pipet pumps

Equipment Transfer pipets

Equipment Burette

Equipment Adjustable-volume micropipets

Equipment Erlenmeyer flask

Equipment Reagent bottles

Equipment Triple beam balance Photo courtesy of Ohaus Corporation

Equipment Electronic balance

Using an Electronic Balance Play video: Using an Electronic Balance

Equipment Weigh boats

Equipment pH meters

Using a pH Meter Play video: Using a pH Meter

Equipment Autoclave

Washing Glassware Add small amount of laboratory soap and use a brush to make sure all surfaces are washed Rinse with tap water until no suds are evident, usually at least 3 times Rinse twice with distilled water Air-dry or use oven to dry

Labeling Name of solution Concentration Date made Name of person who made it Potential hazards if necessary

Hazards Universal hazards label

Significant Figures Rule 1: The number of significant figures is the number of digits to the right of the first non-zero number.

Significant Figures Rule 2: When adding or subtracting numbers, the resulting numbers cannot have any more significant figures to the right of the decimal point than any value used in the calculation.

Significant Figures Rule 3: When multiplying or dividing numbers, the answer cannot have any more significant figures than the value in the calculation with the fewest significant figures.

Sig Fig Practice http://www.mrwiggersci.com/chem/Tutorials/Ch2-Interact-Pract-Sig-Figs-Blacksburg.htm http://www.proprofs.com/quiz-school/story.php?title=sigfig-practice-quiz

Scientific Notation Shorthand method to display numbers that convey their level of precision Uses a number that is multiplied by 10 raised to a positive or negative number

Units of Measure Metric prefixes and suffixes

Scientific Notation Practice http://www.quia.com/quiz/113578.html?AP_rand=424817981

Preparing Solutions Percent solutions Mass per Volume (m/v)

Percent Solution Practice https://www.youtube.com/watch?v=WKJlH-kfUzo Go to 4 min

Preparing Solutions Percent solutions Volume per Volume (v/v)

Percent Solutions Practice https://www.youtube.com/watch?v=WKJlH-kfUzo 2 Min

Preparing Solutions Dilutions

Preparing Solutions Molar solutions Proportional method

Preparing Solutions Molar solutions Unit cancellation method

Diluting Molar Solutions Molar dilutions

Chapter 2 Summary PPE Equipment and Locations Containers Uses Safety PPE Equipment and Locations Equipment Containers Uses Numbers and Accuracy Significant Figures Scientific Notation Making Solutions Molar Solutions Dilutions

Gram Staining http://amrita.vlab.co.in/?sub=3&brch=73&sim=208&cnt=1 http://virtuallabs.nmsu.edu/stain.php