Transcript GENERAL CHEMISTRY LABORATORY

GENERAL CHEMISTRY
LABORATORY
PURPOSE OF LABORATORY
• ILLUSTRATE AND PARTICIPATE IN
SCIENTIFIC INQUIRY
• DEMONSTRATE CHEMICAL FACTS AND
PRINCIPLES
• DEVELOP LABORATORY SKILLS
• ACTIVE LEARNING PROCESS
• BUILD YOUR CONFIDENCE
• LEARN AND BUILD LAB SAFETY SKILLS
SYLLABUS
• See link from Chem 1151 course page.
• GTAs Dinara Gunasekera and Matt
Tjosass
• You must have a U card with a balance of
at least $25.00 before checking into lab.
• Bring your lab packet and Lab Notebook
every lab day.
SYLLABUS (2)
• 20% of Chem 1151 grade 150 Lab Points
= 120 points for lab reports + 30 points for
Lab Notebook.
• Makeup lab is June 28 with all reports by
June 30 (correct syllabus).
SYLLABUS (3)
• Students who are repeating this course
and have successfully completed the lab
must see the instructor.
• Students must pass lecture and lab
separately to pass Chem 1151.
SYLLABUS (4)
• SAFETY SAFETY SAFETY
• Goggles must be worn at all times after
pre-lab and before post-lab work.
• KEEP A CLEAN AND ORDERLY LAB
• Shorts, short skirts or sandals are not
allowed in lab.
SCHEDULE OF EXPTS
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See link from Chem 1151 course page.
GTA will check Pre-Lab Assignment
Pre-Lab Lecture, Questions
Lab group performs experiment(s)
Lab group completes analysis,
calculations, questions, graphing
• GTA signs Lab Notebook before each
student leaves
LAB NOTEBOOK
• See link from Chem 1151 course page.
• The Lab Notebook is an original, complete
and historical record of what you did in lab.
• Write in ink.
• Record data, observations, equipment
information, accidents, errors, questions.
• Pre-lab assignment, Analysis, Post-lab
assignment, rough graphs, calculations
PRE-LAB ASSIGNMENT
• The purpose is to help you prepare for lab.
• The assignment consists of reading the
lab handout, preparing your Lab Notebook
and completing the actual Pre-Lab
Assignment.
• Students who fail to complete this work
prior to the start of lab will not be allowed
in lab that day. These students must
complete the Makeup Lab on June 28.
PRE-LAB ASSIGNMENT (2)
• May 19: Chap 1, Prob 73a convert to m,
Prob 73d convert to m/s, Prob 73f convert
to m2
• May 24:
– Describe how to make 30 mL of 1.0M HCl
from 6.0 M HCl stock solution.
– Calculate the final temperature when 26.0 mL
of water at 83 oC is mixed with 18.0 mL of
water at 27 oC.
LAB REPORT
• See link from Chem 1151 course page.
• A lab report is due one week after the expt
was performed except the June 28 makeup lab is due on June 30.
MOLARITY
• A binary solution contains a solvent (major
component) and a solute.
• The concentration of a solution can be
described quantitatively by its molarity.
• Molarity = M = mol solute/L soln = mol/V
• Note that # mol solute = MV
MOLARITY (2)
• Dilution is governed by the conservation of
moles solute in the concentrated solution
and in the dilute solution.
• Mols solute in conc. = Mols solute in dil.
• M1V1 = M2V2 = constant
• Starting with a 4.0 M concentrated NaOH
solution, prepare 25.0 mL of a 1.5 M soln.
• 4.0M(V1) = 1.5M (25.0 mL) or V1 = 9.375
mL 4.0 M NaOH
QUESTIONS?
NEXT
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Safety Tape
Safety Quiz
Move to lab in Chem 301
Tour of lab
Using the top loading balance, reading a
buret, etc
• Check into lab