SAFE WORK PROCEDURE
LOCATION
VMC
WRITTEN BY: APPROVED BY:
Science Team
The Synthesis of Zinc Chloride
Page 1 of 2
DATE CREATED
WS&H
LAST REVISION
June 27, 2014
New
PERSONAL PROTECTION EQUIPMENT (PPE)
Safety glasses or face shield must be worn at all
times in work areas.
Long and loose hair must be tied back
Appropriate footwear must be worn. Shoe must
be fully enclosed. No open toed shoes.
Close fitting/protective clothing must be worn.
Remove strings hanging from pullovers/sweaters.
Rings and jewelry (long necklaces / bracelets,
etc.) must not be worn.
HAZARDS PRESENT
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Chemical burns
Absorption of Chemicals.
Inhalation of Chemicals.
Ingestion of Chemicals.
Slips / trips & falls
Chemical hazards
ADDITIONAL
REQUIREMENTS
APPARATUS / MATERIALS
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Zinc
Test tube
Beaker
Water
HCl
Graduated cylinder
Balance
Evaporating dish
Glass stirring rod
Paper towel
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Equipment orientation
WHMIS training
SAFE WORK PROCEDURE
1. Don all personal protective equipment including: safety glasses, & protective nitrile gloves
(where required). Ensure all loose clothing is either removed or tied back. Remove any jewelry
and tie back long hair.
2. Obtain a sample of zinc and mass it to the nearest 0.01g.
3. Place the zinc in a medium-sized test tube.
4. Fill a 500ml beaker half full of water and place the test tube in the beaker of water.
5. Add 10ml of HCl to the test tube. Put your name on it and set it aside for next class. Be careful
when pouring HCl as it is extremely corrosive.
6. Next class, determine the mass of an evaporating dish to the nearest 0.01g.
7. Decant the liquid into the evaporating dish. Be careful not to get any of the unreacted zinc
into the dish (if there is any). You may have to hold it back using a glass stirring rod.
8. Rinse the test tube and unreacted zinc with 5ml of tap water and pour this into the dish.
SAFE WORK PROCEDURE
The Synthesis of Zinc Chloride
Page 2 of 2
9. Pour the unreacted zinc, if any, onto a paper towel and let it dry.
10. Evaporate the liquid in the evaporating dish. Continue heating until the solid appears to be
melted. This ensures that all the water is gone and that only the zinc chloride remains in the
dish.
11. Determine the mass of the evaporating dish and its contents to the nearest 0.01g.
12. Calculate the mass of zinc chloride to the nearest 0.01g.
13. Determine the mass of the unreacted zinc to the nearest 0.01g. If none was left, record 0.00g.
14. Clean up your workstation.
REGULATORY REQUIREMENTS
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WS&H Act W210, Section 4, 5
Mb. Regulations 217/2006,
Part 16, (Machines / Tools & Robots) Sections 16.1-16.18)
Part 35, (WHMIS Application)
Part 36, (Chemical & Biological Substances Application)