Access study documents, get answers to your study questions, and connect with real tutors for CHEM 108: Fundamentals Chem Laboratory at Community College Of Baltimore County. Chemistry Lab Manual, Textbooks Barnes & Noble - FIND Chemistry Lab Manual, Textbooks on Barnes & Noble. Virtual ChemLab, Organic Chemistry, Student Lab Manual/ Workbook and CD Combo Package, Chemistry 107 Lab Manual (Custom Edition): - Chemistry 107 Lab Manual (Custom Edition) Pearson on Amazon.com.FREE. shipping on qualifying offers. Contents Safety Precautions Locker Inventory.
CHEM 107 General Chemistry Lab I
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.
STEP 1: Procedure
![Chemistry 107 lab manual Chemistry 107 lab manual](https://i.pinimg.com/736x/42/ae/bc/42aebc9450f48bd390b2bd7ff7e791b8.jpg)
·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.
General Chemistry (CHE 107) Nassau Community College
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.
Chemistry Lab Manual Answer Key
·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)
§Pb2++Cl-®PbCl2(s)
·The Na+ Outlook express windows 7 en. 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.
![Lab Lab](https://coverart.oclc.org/ImageWebSvc/oclc/+-+708885512_140.jpg?SearchOrder=+-+OT,OS,TN,GO,FA)
·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+. Microsoft office torrent download mac.
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+.
Chemistry 107 Lab Manual Answers
STEP 3:Flow Chart
·Complete the flow chart to represent the procedures and results from step 3.
Nov 10, 2009 Fear of a Krabby Patty - Best Day Ever. This feature is not available right now. Please try again later. All Titles TV Episodes Celebs Companies Keywords; Advanced Search. SpongeBob SquarePants. 6 May 2005 Fear of a Krabby Patty/Shell of a Man. At first the prospect of never leaving work is like a dream come true for SpongeBob. Jun 30, 2016 SpongeBob Season 5 Episode Title Cards - Duration: 1:21. Season 4-11 48,333 views. Building the Perfect Squirrel Proof Bird Feeder - Duration: 21:40. Mark Rober Recommended for you. 77 rows The fourth season of the American animated television series SpongeBob SquarePants. List of episodes. The fourth season of the American animated television series SpongeBob SquarePants, created by former marine biologist and animator Stephen Hillenburg, was announced in November 2004.It premiered on May 6, 2005 with the episodes 'Fear of a Krabby Patty' and 'Shell of a Man,' and ended on July 24, 2007 with the episode 'Squid Wood.' Spongebob season 4 episode titles.
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.
Chemistry 109 Lab Manual - Ulm.edu
STEP 4:Flow Chart
Elementary Chemistry 107 Lab Manual
·Complete the flow chart to represent the procedures and results from step 2.