Monday, Aug. 27th: “A” Day
Tuesday, Aug. 28th: “B” Day
Agenda
 Collect safety agreements/pass back safety tests
 Consequence Report/Lab equipment handout
 Lab write-up format/evaluation rubric
 Lab handout/discussion/write-up
 Safety project work time - due NEXT class period!
 We will be in the lab NEXT class period –
be sure to dress appropriately…NO FLIPFLOPS!!!
Get SSA signed and turned in or you won’t
be allowed in lab!
Lab Consequence Report
As students of chemistry, you must know that
absolutely no unsafe activity will be tolerated
in the lab!
If you are asked to leave the lab, you will be
required to complete a lab consequence
report before being allowed back into the lab.
You will receive a zero on the lab.
Your parents/guardians will be notified.
Lab Folders
 All lab write-ups and handouts will be kept in a
separate, yellow folder.
 The folder will begin with a table of contents that’s
updated as new labs are added.
 Lab procedures will be passed out before the lab so
that you will have time to complete the lab write-up
prior to conducting the lab.
 All labs will be graded according to a rubric.
Lab Equipment Handout
Become familiar with the common lab
equipment on this page.
Keep this page on the left side of your yellow
lab folder for future reference.
Lab Write-Up Format
and
Evaluation Rubric
All lab write-ups need to follow the correct
format.
All conclusion questions need to be answered
using COMPLETE SENTENCES!
Keep these on the left side of your yellow lab
folder for future reference.
Lab: “Lab Techniques”
Get together with your lab partner now (8:00)
Get out some blank paper.
We’re going to do your 1st lab write-up!
Table of Contents
Title of Lab
Lab Techniques
Lab Number
1
Write “Table of Contents” at the top of a blank
piece of paper.
Make 2 columns: Title of Lab and Lab Number
Write the lab name and number of lab.
The table of contents page is always the first
page on the right-hand side of your lab folder.
Lab Write-Up
Title-Purpose-Hypothesis-MaterialsProcedure
Since this is your first lab write-up, we’ll do it
together as a class…
Title
This is the easiest section of the whole lab
write-up.
Simply write the title of the lab at the top of a
blank piece of paper.
“Lab Techniques”
Purpose
 What is the purpose of this lab?
 What are you trying to learn or figure out?
 This information is typically found in the opening
paragraphs of the lab handout.
Purpose
The purpose of this lab is to learn how to use a
bunsen burner, how to handle solids and liquids,
how to use a balance, and how to practice basic
safety techniques in lab work.
Hypothesis
With your lab partner, discuss what you think
the outcome of the lab will be.
What do you think will happen?
Hypothesis
After completing this lab, I will know how to
work safely in a chemical laboratory.
Materials
 The materials section is simply a list of the materials
that are needed to conduct the lab.
Materials
-Balance
-100 mL grad cylinder
-250 mL beaker (2)
-Wire gauze
-Bunsen burner/striker
-NaCl (sodium chloride)
-Copper wire
-Spatula
-Crucible tongs
-Test Tube
-Evaporating dish
-Weighing paper
-Water squirt bottle
-Test tube holder
Procedure
 This is the section of the lab write-up that will
take up most of your time.
 You need to list step-by-step instructions on how
to conduct the lab.
 The first step should ALWAYS BE safety
equipment.
 The last step should ALWAYS BE clean up and
wash hands.
 You CAN use pictures or sketches.
 You CAN simply use bullet points.
 Summarize – DON’T just re-write everything from
the lab handout.
Procedure
1.
2.
3.
4.
5.
Safety glasses/apron/hair
Location of safety equipment/Table 1
Gas valves off?
Compare bunsen burner w/picture
Partly close air ports, turn on gas, light burner
w/striker. Adjust gas valve/flame 8 cm above
barrel. Adjust/flame/steady, quiet, w/lightblue inner cone.
Procedure, continued
6. Crucible tongs/hold 10 cm copper wire in
flame (see pic) 2-3 sec/3 different spots.
Observations/Table 1
7. Completely close air ports/observe/record
color of flame/sound. Crucible tongs/hold
evap. dish tip of flame 3 min. Cool on wire
gauze, burner off. When cool, look at
dish/record observations.
8. Balance = zero.
Procedure, continued
9. Mass weigh paper/nearest .01g/Table 2. NaCl on
separate piece/transfer 13 g NaCl to paper on
balance. Exact mass/Table 2.
10. Transfer NaCl on paper test tube (see pic)
11. Mass 250 mL beaker/record Table 3. Add water
to 50 mL mark, mass, record/Table 3. Repeat,
filling to 100 mL mark and 150 mL mark/record
mass each time. Find mass of water only by
subtracting mass of empty beaker from mass of
water + beaker.
Procedure, continued
12. Repeat step 11 w/dry 250 mL beaker but
use graduated cylinder for volumes of water.
Bottom of meniscus for measurements.
Record nearest 0.1 mL/Table 3.
13. Clean equipment, put back where found,
gas valves off, clean tables, WASH HANDS.
Procedure, continued
That’s it!
Staple your lab write-up to the front of your
lab handout and put it in your yellow lab
folder behind the table
of contents.
Safety Project Work Time
Be sure to use whatever class time we have left
wisely…
Remember, the safety projects are
DUE NEXT CLASS PERIOD!
NEXT TIME:
Lab next class period – be sure to dress
appropriately…NO FLIP-FLOPS!
No signed safety agreement = no lab!