CHEM 107 General Chemistry Lab I
Lab Manual ii PREFACE Most students who take freshman chemistry are not planning for a career in this discipline. As a result, the introductory chemistry course usually serves several functions at various levels. It begins the training process for those who seek to become chemists. CHEM 107 LABORATORY. Elementary Chemistry Lab is a concurrent requirement of Elementary Chemistry (Chem 107). It is designed to illustrate chemical principles and teach fundamental techniques. You must pass the lab portion of the class in order to pass the course. REQUIRED MATERIALS: Elementary Chemistry 107 Lab Manual 4 th ed.
Qualitative Analysis Scheme -Prelab
Before coming to lab, you should:
- Read the assigned background reading in Cooperative Chemistry Laboratory Manual and in Chemistry and Chemical Reactivity (See laboratory handout for page numbers.)
- Answer the following questions on a separate sheet of paper :(Turn in to your lab instructor at the beginning of lab.)
- (3 pts)Define the following terms:a) decantb) supernatantc) precipitate
- (1 pt)Consider the following chemical reaction:
AgNO3(aq)+NaCl(aq) →AgCl+NaNO3
In this chemical reaction, a precipitate formed.What is the precipitate that formed?
- (1 pt)This is a qualitative experiment.What does this mean?What will you be looking for in this experiment?
- (5 pts)The following problem is an example of a qualitative analysis experiment using precipitate reactions to remove ions sequentially from a mixture. This example will familiarize you with a flow chart, which is a graphical representation of the procedures and the results.
The mixture contains 3 ions, Ag+, Pb2+, and Na+.The three ions must be separated from this solution.This experiment will only be done on paper in order to familiarize you with the process of generating a flow chart. Mods for game dev tycoon.
STEP 1: Procedure
·Add 4 drops of 6M HCl to 10 drops of the test solution (the test solution is the solution containing all three ions, Ag+, Pb2+, Na+).Decant the supernate into a clean test tube and savefor STEP 3 and save the ppt for STEP 2.
STEP 1:Flow Chart
·When HCl is added to the test solution, a precipitate (ppt) forms in the bottom of the test tube.What is this ppt?Use the Solubility Guidelines on page 60 of your lab book to determine what solid formed.
·Notice from the Solubility Guidelines that all chlorides are soluble except Ag+ and Pb2+ ions.Therefore, the following reactions took place when HCl was added to the test solution:
§Ag++Cl-®AgCl(s)
·The Na+ ion remains in solution.Now we have a test tube with a liquid and a solid.The liquid was separated from the solid.
·Next, this process must be represented in a flow chart before continuing with the experiment.In the flow chart, you want to record procedures, results, and observations.The flow chart for step 1 is done for you.
STEP 2:Procedure
·Add 15 drops of distilled water to the ppt obtained in STEP 1 and place the test tube in a hot water bath.Centrifuge and decant the supernate.Save the ppt for STEP 3.To the supernate, add 3 drops of 1M Na2CrO4.The formation of a yellow ppt, PbCrO4, confirms the presence of Pb2+.
STEP2:Flow Chart
·PbCl2 is soluble in hot water while AgCl is not.Therefore, the test tube now contains a liquid and a ppt.The ppt is _______________ and the supernate contains the ___________ ion.
·Next, this process must be represented in a flow chart before continuing with the experiment.
·Complete the flow chart to represent the procedures and results from step 2.Indicate in the flow chart, that hot water was added to the ppt from step 1.Next, indicate that the ppt contains the silver ion and that the supernate contains the Pb2+ ion.Next, indicate that 3 drops of 1 M Na2CrO4 was added to the supernate (which contains the lead ion).A yellow ppt (PbCrO4) formed confirming the presence of Pb2+.
STEP 3:Procedure
·Add 10 drops of 6M NH3 to the ppt from step 2.The ppt must be completely dissolved.
·Next, add 20 drops of 6M HNO3.The solution must be acidic.Stir the solution and test its acidity.Continue to add HNO3 dropwise until the solution is acidic.A white cloudiness confirms the presence of Ag+.
STEP 3:Flow Chart Inergen installation manual.
·Complete the flow chart to represent the procedures and results from step 3.
STEP 4:Procedure
·To confirm the presence of Na+, perform a flame test.The sodium ion will impart a characteristic yellow color to the flame.
![107 107](https://i.ebayimg.com/images/g/ISsAAOSw7GBeiPQu/s-l300.jpg)
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STEP 4:Flow Chart
·Complete the flow chart to represent the procedures and results from step 2.
CHE 107 General Chemistry for Engineers
Credits and contact hours
Credit hours: 4
How to hd youtube videos mac. Three one-hour (or two one-hour and thirty-minute) lectures per week, plus either one two-hour recitation or one two-hour laboratory per week.
How to hd youtube videos mac. Three one-hour (or two one-hour and thirty-minute) lectures per week, plus either one two-hour recitation or one two-hour laboratory per week.
Instructor Massive 1.5.1 r2r. : ??? (Fall 2019)
Course Syllabi
- (none)
Textbook and/or other required materials
1. Text: McMurry and Fay, 'Chemistry, 6th Ed.', Prentice-Hall, 2010. Either the full edition (ISBN 1256091111) to be used for both CHE 107 and CHE 108 or the 'custom' edition for CHE 107 only (ISBN 0536397791). 2. 'Selected Solutions Manual for Chemistry, 6th ed.' By Joseph Topich for McMurry and Fay, Prentice Hall, 2010 (included at a discount in the package with the text ISBN above). 3. Mastering Chemistry, (included at a discount in the package with the text ISBN above). Two factor authentication office 365 outlook 2016 for mac. 4. Lab Manual: Scaife, Beachley, & Allendoerfer, 'Chemistry in the Laboratory, University at Buffalo, 11th Ed.', Thomson Custom Publishers 2009 (ISBN 1426633092). 5. Lab Materials: CHE 101-2/107-8 Lab Kit, safety glasses with side shields, lab coat, padlock for lab drawer. 6. A valid University I.D. card will be required at examinations and for some laboratories. 7. A scientific calculator with arithmetic and transcendental function (sine, cosine, log, etc.) capability is required for quizzes and examinations.
Elementary Chemistry 107 Lab Manual
Catalog description
Meets the general chemistry requirement for students wishing to receive an engineering degree.
Type | Prerequisites | Corequisites |
---|---|---|
Required | (none) | (none) |
Course goals
Chemistry 107 Notes
The following table lists course learning outcomes for CHE 107. The statements generally complete the sentence 'Upon completing this course, students should be able to.'
Goal | Student Outcome | Assessment Methods | |
---|---|---|---|
1 | Understand and apply concepts to solve problems using: the Periodic Table of Elements; experimentation and measurement; accuracy, precision, and significant figures in measurement calculations | a | Exam, Homework |
2 | demonstrate atomic structure theory | a | Exam, Homework |
3 | quantitate and utilize atomic mass | a | Exam, Homework |
4 | identify compounds, mixtures, molecules, ions, and chemical bonds | a | Exam, Homework |
5 | name chemical compounds | a | Exam, Homework |
6 | utilize chemical symbols, formulas, equations, Avogadro's number and mole theory to recognize, balance and characterize quantities using chemical equations: understand and quantify titrations; determine percent composition and empirical formula; determine molecular masses | a | Exam, Homework |
7 | characterize reactions in aqueous solution, including: write aqueous reactions, total ionic and net ionic equations, precipitation reactions and solubility rules | a | Exam, Homework |
8 | Use the properties of electromagnetic radiation to qualitatively and quantitatively describe: electromagnetic radiation and atomic spectra; wavelike properties of matter using the de Broglie equation | a | Exam, Homework |
9 | Be able to name and use quantum numbers in relation to: Orbital shapes and energy; Quantum Mechanics and Atomic Line Spectra; Electron Spin and the Pauli Exclusion Principle | a | Exam, Homework |
10 | Write out Electron Configurations for elements on the periodic table | a | Exam, Homework |
11 | Predict trends for electron configurations and periodic Properties: atomic and ionic radii | a | Exam, Homework |
12 | Identify Ionic Bonds and Main-Group Chemistry as it refers to: Ions and their Electron Configurations; Ionic Radii; Ionization Energy; Electron Affinity; Lattice Energies of Ionic Solids; Groups of the periodic table | a | Exam, Homework |
13 | Identify Covalent Bonds and Relate to Molecular Structure in the following ways: Rank strengths of Covalent Bonds; Compare ionic and Covalent Compounds; Draw Electron Dot Structures; Utilize VSEPR Model, Valence Bond Theory, and Molecular Orbital Theory | a | Exam, Homework |
14 | Utilize thermochemical principles as they relate to chemical energy: Calculate Energy Changes and Enthalpies of Physical and Chemical Change; Quantify heat exchange in Calorimetry; Use Hess's Law | a | Exam, Homework |
15 | Qualitatively and quantitatively relate enthalpy to entropy and free energy | a | Exam, Homework |
16 | Use the gas laws to quantify gases and their behavior in chemical reactions and in relation to other gases | a | Exam, Homework |
17 | Identify and rank intermolecular forces | a | Exam, Homework |
18 | Use phase diagrams | a | Exam, Homework |
19 | Name unit cells and the packing of spheres in crystalline solids | a | Exam, Homework |
20 | Know the general properties of metals and solid-state materials | a | Exam, Homework |
21 | Conduct a laboratory experiment related to separation of heterogeneous mixtures | b | Lab Report |
22 | Conduct a laboratory experiment related to molecular weight by acid/base titration | b | Lab Report |
23 | Conduct a laboratory experiment related to chemical reaction and solubility | b | Lab Report |
24 | Conduct a laboratory experiment related to enthalpy | b | Lab Report |
25 | Conduct a laboratory experiment related to ideal gas law | b | Lab Report |
Student outcome support
0: Not Supported, 1: Minimally Supported, 2: Supported, 3: Strongly Supported
Student Outcome | a | b | c | d | e | f | g | h | i | j | k |
Support Level | 3 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Topics covered
liquids, solids, and phase changes | matter and measurement | metals and solid-state metals |
reactions in aqueous solution | gases: their properties and behavior | atoms, molecules, and ions |
formulas, equations, and moles | ionic bonds and main-group chemistry | covalent bonds and molecular structure |
thermochemistry: chemical energy | periodicity and atomic structure |