Name______________________________________ Date___________________ Period____________
LAB - Observing Properties and Changes in Matter
Objectives:
1) To distinguish between physical extensive, physical intensive, and chemical properties.
2) To distinguish between physical and chemical changes in matter.
3) To reinforce that matter can be classified and to practice classifying matter.
Equipment:
100mL beaker, thermometer, glass stirring rod, spatula, 25 mL graduated cylinder, weigh boat,
balance
Materials:
Copper (II) chloride (CuCl2), water and aluminum foil
Safety:
1) Wear safety goggles and aprons.
2) No food or drink in lab
3) Examine the odor of chemicals cautiously by wafting a hand across the top of the container
toward your nose.
4) Copper (II) chloride is an irritant. Avoid skin contact with this chemical. Wash hands thoroughly
after use. See attached MSDS for properties and warnings.
Procedure:
As you perform the experiment, record your observations and answer the questions in the data table.
All blank boxes should be filled with your responses.
1. Mass the Copper (II) chloride.
a. Zero the balance. Place a plastic weigh boat on the balance and zero again.
b. Add about 3.00 grams of CuCl2 to the weigh boat. If you go over this mass, proceed
anyway. Do not replace excess back into the container. Record the mass in the data table.
Type of matter
Copper (II) chloride crystals
(CuCl2)
Property
Element, Compound, Homogenous Mix, Hetero Mix
Intensive physical,
Extensive physical or
Chemical?
Response
Does it have luster?
Mass of sample
Color
Size of crystals
Odor
LARGE
MEDIUM
SMALL
2. Fill the 100 mL beaker with 25 mL of water. Without stirring, add your 3 gram sample of copper (II)
chloride to the beaker.
Type of matter
Copper (II) chloride crystals
in water WITHOUT stirring
Element, Compound, Homogenous Mix, Hetero Mix
3. Stir the copper (II) chloride and water together with the glass stirring rod until the crystals are
completely dissolved. Place a thermometer in the copper (II) chloride solution and note the temperature
in the data table below.
Type of matter
Copper (II) chloride crystals
in water AFTER stirring
Property
Element, Compound, Homogenous Mix, Hetero Mix
Response
Intensive physical,
Extensive physical or
Chemical?
Color of solution
Is CuCl2 soluble in water?
o
Temperature of solution
Question
What type of change
occurred when you added
the CuCl2 to water?
C
Response
PHYSICAL
What evidence do you
have?
CHEMICAL
4. Obtain a 0.5 gram sample of aluminum foil using your digital scale. Form the aluminum foil into a ball.
Type of matter
Element, Compound, Homogenous Mix, Hetero Mix
Aluminum foil
Property
Does it have luster?
Mass of sample
Color
Is Al malleable?
Response
Intensive physical,
Extensive physical or
Chemical?
5. Place the ball of aluminum in the copper (II) chloride (CuCl2) and solution observe the mixture from the
side. DO NOT LOOK DIRECTLY DOWN INTO THE BEAKER. Continue to observe the mixture and
answer questions in the data table for 10 minutes noting any changes in temperature. Answer the
questions that follow.
Type of matter
Copper (II) chloride crystals
in water WITHOUT stirring
Property
Element, Compound, Homogenous Mix, Hetero Mix
Response
Intensive physical,
Extensive physical or
Chemical?
Is CuCl2 reactive with Al
Odor of the gas produced
Color of solid product
Color of remaining solution
Highest temperature
reached
Question
When the Al is added to the
CuCl2, what type of change
occurs?
__________ oC
Response
PHYSICAL
What evidence do you
have?
CHEMICAL
What is the solid product
that formed?
6. When the reaction is complete, pour off the liquid portion of the mixture into the waste beaker. Discard
the solid contents of the beaker into the garbage. Rinse and dry the equipment used and clean your
station to prepare for the next group. Wash your hands before leaving the lab.
Material Safety Data Sheet (MSDS)
Material Safety Data Sheet MSDS #: 281.05
SECTION 1 — CHEMICAL PRODUCT AND COMPANY IDENTIFICATION
Copper(II) Chloride Dihydrate
Health-3
Flammability-0
Reactivity-1
Exposure-1
Storage-1
SECTION 2 — COMPOSITION, INFORMATION ON INGREDIENTS
Copper (II) chloride dihydrate
Synonym: cupric chloride, copper dichloride
CAS#: 10125-13-0
SECTION 3 — HAZARDS IDENTIFICATION
Light blue-green powder or crystals. Odorless.
Highly toxic by ingestion and inhalation. Irritant. Avoid all body tissue contact.
0 is low hazard
3 is high hazard
SECTION 4 — FIRST AID MEASURES
Call a physician and seek medical attention for further treatment, observation, and support after first aid.
Inhalation: Remove to fresh air at once. If breathing has stopped, give artificial respiration immediately.
Eye or External: Immediately flush with fresh water for at least 15 minutes.
Internal: Rinse mouth. Give large quantities of water for dilution. Call a physician or poison control at once.
SECTION 5 — FIRE FIGHTING MEASURES
Nonflammable solid.
When heated to decomposition, may emit chlorine.
Fire Fighting Instructions: Use a triclass, dry chemical fire extinguisher. Firefighters should wear PPE and
SCBA with full facepiece operated in positive pressure mode.
SECTION 6 — ACCIDENTAL RELEASE MEASURES
Restrict unprotected personnel from the area. Sweep up the spill, place in a sealed bag or container, and dispose. Ventilate
area and
wash spill site after material pickup is complete. See Sections 8 and 13 for further information.
SECTION 7 — HANDLING AND STORAGE
Flinn Suggested Chemical Storage Pattern: Inorganic #2. Store with acetates, halides, sulfates, sulfites, thiosulfates, and
phosphates. Deliquescent; store in Flinn Chem-Saf Bag. Use and dispense in a hood.
SECTION 8 — EXPOSURE CONTROLS, PERSONAL PROTECTION
Avoid contact with eyes, skin, and clothing. Wear chemical splash goggles, chemical-resistant gloves, and chemical-resistant
apron. Use ventilation to keep airborne concentrations below exposure limits. Always wear a NIOSH-approved respirator
with proper cartridges or a positive pressure, air-supplied respirator when handling this material in emergency situations
SECTION 9 — PHYSICAL AND CHEMICAL PROPERTIES
Light blue-green powder or crystals. Odorless.
Solubility: Water soluble and alcohol.
Formula: CuCl2 2H2O
Formula weight: 170.483
Melting point: 100 oC (decomposes)
Specific gravity: 2.51
SECTION 10 — STABILITY AND REACTIVITY
Avoid contact with moisture and alkali metals.
Shelf life: Poor, deliquescent.
SECTION 11 — TOXICOLOGICAL INFORMATION
Acute effects: Toxic, irritant, and gastrointestinal disturbances.
Chronic effects: N.A.
Target organs: N.A.
SECTION 12 — ECOLOGICAL INFORMATION
Data not yet available.
SECTION 13 — DISPOSAL CONSIDERATIONS
Please review all federal, state and local regulations that may apply, before proceeding.
Flinn Suggested Disposal Method #26a is one option.
SECTION 14 — TRANSPORT INFORMATION
Shipping name: Copper Chloride
Hazard class: 8, Corrosive
UN number: UN2802
SECTION 15 — REGULATORY INFORMATION
TSCA-listed, EINECS-listed (231-210-2).
N.A. = Not available, not all health aspects of this substance have been fully investigated.