Chesapeake Campus Chemistry 111 Laboratory
Lab #6- Reactions & Solubility/Studying Chemical Reactions
Classify chemical reactions by type after observing evidence.
Predict the precipitate in a chemical equation using solubility rules.
Test #1 Ch 1-3-CHM 101
1.Which of the following is a physical change?
A) the rusting of iron
B) the condensation of water vapor
C) the baking of a potato
D) the explosion of nitroglycerin
2) 1-butanethiol, one of the compounds giving skunks their distinct
AND SHAPES OF
The study of the compounds of carbon.
Over 10 million compounds have been identified.
About 1000 new ones are identified each day!
C is a small atom.
It forms single, double, and tr
Hydrocarbon: A compound composed of only carbon
and hydrogen atoms.
Saturated hydrocarbon: A hydrocarbon containing only
carbon-carbon single bonds.
Unsaturated hydrocarbon A hydrocarbon that contains
Chem 111 Test 3
Balance each of the following oxidationreduction reactions by using the oxidation states
a. Cl2(g) + Al(s) Al3+(aq) + Cl-(aq)
b. O2(g) + H2O(l) + Pb(s) Pb(OH)2(s)
c. H+(aq) + MnO4-(aq) + Fe2+(aq) Mn2+(aq) + Fe3+(aq) + H2
PERIODIC PROPERTIES OF ELEMENTS
Atoms gain energy and they become excited
Added energy is absorbed by electrons and the
# Chapter Title
PowerPoint Image Slideshow
INTRODUCTION TO CHEMISTRY
Chemistry is the study of matter and energy
Knowledge of chemistry is central to understanding a wid
Name: Class Date: II): A
Dr. Maarei Practice Test III, CHM 111
Multiple Choice .
Idenn the letter oft/1e choice that best completes the statement or answers the question. _.-I< C 3
I. All of the following statements are true EXCEPT
a. energy is neither cr
Wile and Sons
This is called an ionic equation. A net ionic equation represents only the ions
involved in the observed chemical reactionin this case, the formation of a precipi-
tate. For this example, the net ionic equation would b
1 = Battery acid ~
2- Lemon juice EAcid rain
uVmegar Adult fish die
Fish r production affected
Milk of Magnesia
Courtesy of Micro Essential Labs
Figure 6.6 The pH of a solution can be estimated with pH
paper, such as Hydrion pH test p
Wiley and Sons
Hydrated: ions having bonded water
molecules are hydrated.
Flgure 6.1 Phosphoric acid is
the additive that delivers the tart
taste in many soFt drinks.
Neutralization reaction: a chemical
E. Reactions of
approximate pH of
an aqueous solution.
The Next Step
'I 08 Acids, Bases, and Salts
Table 6.1 An Organization of the Reactants for a Series of Reactions
CLEANUP: Rinse all of the used test tubes twice with tap water and twice with
1. Reaction of aqueous sodium hydroxide with acid. Place ~l mL of l M NaOH in B. Bases and Basic
a small test tube. Test the solution with litmus. Add and cou
Jr.) A. Baron/Trey Hernandez
- To become familiar with the chemicai properties of acids, bases, and salts
' To develop the concept of pH and approximate the pH of common acids, bases,
- To observe the relative solubility of common salts
Courtesy of VWR International, lLC
Figure T.16c Draw the liquid
into the pipet with the aid at a
rubber pipet bulb cfw_not the
C. Titrating at
Titrant: the reagent solution in the
buret to be used For the experiment
10 A. Beran
Jo A Baron/Trey Hernandez
Figure T.13c Place the Home Figure T.'I3d A hot water bath Figure T.l3e Move the test tube
directly beneath the tip of the stirring may be used to maintain solution in circularly in and out of the cool flame,
Jo A. Beron
Figure 1160 Read the volume of 0 Figure T.lb Use a black line drawn on
liquid with the eye horizontal to the bottom o white cord to assist in pinpointing the
oi the meniscus. location of the bottom of the meniscus.
The most common type of pi
Compacted Decantate or
precipitate m/ supernatant
Figure T.'I 'lh Decant the supernatant from the
Observe the following precautions in operating a centrifuge:
- Never ll the centrifuge tubes to a height more than 1 cm from the top
Courtesy oF Thermo Fisher
Courtesy of Thermo Fisher Scientific
lo A. Beran
Figure T.'I2a A modern laboratory Figure T.12b Position a tunnel,
fume hood. connected to a water aspirator, over the
escaping gases. A hot plate is often
If a magnetic stirrer is used for mixing the titrant with the analyte, operate at a
low speed to minimize any splashing of the reaction mixture and to minimize oxy-
gen of the air from mixing and reacting with either the titrant or analyte. Occa-
If a solid is to be separated from the liquid using a ltering process, then the lter paper
must be properly prepared. For a gravity ltration procedure, rst fold the lter paper in
half (Figure T.11c), again fold the lter paper to within about 10 of a 90 fo
.10 A Baron
Jo A Beran
Figure T.15c Drying or tiring a Figure T.15d ignition of a solid Figure T.15e Ignition of a solid
crucible and cover sample in the absence of air sample in the presence of air for
2. Igniting contents in the ab
Jo A. Beran
:5 :1: mt.
E .-, . .
5 t E
a? t .3
Figure T.16f Setup For a titration Figure T.169 A 50-mL buret is Figure T.'|6h Titration technique for
analysis marked from tap to bottom, 0 to right-handers
50 mL, with i-rnL grada
TE (3 H N 1 Q u E 1 4, To remove a liquid from a vessel by evaporation, the ammability of the liquid must
E V A P O R A TI N G be considered. This is a safety precaution.
L Use a fume hood or an improvised hood (Technique 12) as recommended to
IQ U I D 5
_q . _ , .
Figure T.'I 'Ie Flushing the precipitate from a Figure T.'l 'If The aspiralor should be fully open during the vacuum-
beaker with the aid of a wash" bottle Filtering operation.
Once the lter paper is sealed, turn the water faucet attached t
Courtesy of Thermo Fisher Scientific
Courtesy of Thermo Fisher Scientic
Figure T.'I 5a A modern laboratory Figure T.'I 513 A simple laboratory desicooler (lei-ll or a glass desiccator (right)
drying oven contains a desiccant (usually anhydrous CoCl2)