annotated-P2%20Post-Lab%20Activity-2

.pdf

School

University of Texas *

*We aren’t endorsed by this school

Course

204

Subject

Chemistry

Date

Apr 28, 2024

Type

pdf

Pages

5

Uploaded by ColonelWorldBadger27 on coursehero.com

P2 Post-Lab Activity Instructions: Feel free to read this page ahead of time, but keep the actual work for your wet lab time (unless the procedure tells you otherwise). Work with your podmates to complete the following questions. Please put any text answers in RED text so it is easier for the TA to identify where your answers are written. Save the file as either a .docx, .doc, or .pdf to upload. If you have trouble, ask your TA how to do this. Please remember to click the SUBMIT button after uploading all Post-Lab files. The assigned Recorder must then send this document to the other members of the pod . The Group Lead should ensure each member has a viewable copy before leaving the lab. (8 pts) Station 1: Conductivity of Solutions Identify each substance as an electrolyte, non-electrolyte, or weak electrolyte. Then rank them from strongest to weakest electrolyte. What trends do you observe? Table sugar (glucose): 1 5% Table salt (NaCl): 1760 0.5% Table Salt (NaCl): 1895 5% Vinegar: 1965 Tap Water: 1960 DI Water: 1 5% Vinegar: 1965 Tap Water: 1960 0.5% Table Salt (NaCl): 1895
5% Table salt (NaCl): 1760 Table sugar (glucose): 1 DI Water: 1 Calcium Carbonate: 1 Depends on whether there are ion in the solution as is conducts electricity in the solution. (8 pts) Station 2: Intermolecular Forces a) Use the concept of intermolecular forces to explain your observations at this station. Capillary action moves the acetone up the chalk and caused one of the glow sticks to not glow as it diluted the glow stick solution to the point that it did not glow. Acetone is nonpolar, so when it goes up, any compound in the solution will travel with the acetone up the chalk. b) It is known that some brands of glowsticks have two dyes with the structure shown on the right and on the next page. If you were to run this station again with the known glowstick, which compound would appear as the top band and which would appear as the bottom band? Compound 1
Top band: Compound _1_ because Acetone is nonpolar, so when it goes up, any compound in the solution will travel with the acetone up the chalk Bottom band: Compound _2_ because it didn’t travel up the chalk since it is polar (8 pts) Station 3: Acids and Bases a) What was the appearance of your samples after adding bromothymol blue? Why? The DI water was green and tap water was blue. b) What happened to each sample as you added HCl? How much HCl was added to each sample? Come up with a hypothesis that can explain your observations for both DI and tap water. The DI water’s pH went down much faster than the tap water because the ions are acting as a buffer, so that causes the tap water’s pH to decrease slower. Compound 2
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
  • Access to all documents
  • Unlimited textbook solutions
  • 24/7 expert homework help
Recommended textbooks for you
Text book image
Chemistry
Chemistry
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Cengage Learning
Text book image
Chemistry
Chemistry
ISBN:9781259911156
Author:Raymond Chang Dr., Jason Overby Professor
Publisher:McGraw-Hill Education
Text book image
Principles of Instrumental Analysis
Chemistry
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Cengage Learning
Text book image
Organic Chemistry
Chemistry
ISBN:9780078021558
Author:Janice Gorzynski Smith Dr.
Publisher:McGraw-Hill Education
Text book image
Chemistry: Principles and Reactions
Chemistry
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:Cengage Learning
Text book image
Elementary Principles of Chemical Processes, Bind...
Chemistry
ISBN:9781118431221
Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:WILEY
SEE MORE TEXTBOOKS
Recommended textbooks for you
Text book image
Chemistry
Chemistry
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Cengage Learning
Text book image
Chemistry
Chemistry
ISBN:9781259911156
Author:Raymond Chang Dr., Jason Overby Professor
Publisher:McGraw-Hill Education
Text book image
Principles of Instrumental Analysis
Chemistry
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Cengage Learning
Text book image
Organic Chemistry
Chemistry
ISBN:9780078021558
Author:Janice Gorzynski Smith Dr.
Publisher:McGraw-Hill Education
Text book image
Chemistry: Principles and Reactions
Chemistry
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:Cengage Learning
Text book image
Elementary Principles of Chemical Processes, Bind...
Chemistry
ISBN:9781118431221
Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:WILEY
SEE MORE TEXTBOOKS