Unit 2 Lab - Chemical Reactions - SchoolWorld an Edline Solution

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MATERIALS
- Bunsen Burner
- 6 test tubes
- test tube rack
- test tube clamp
- distilled water bottle
- wooden splints
- gas lighter
- safety goggles
- lab apron
- cotton
- crucible tongs
-
Copper wire
Distilled water
Iron (steel wool)
0.15 mol/L sodium carbonate
0.1 mol/L silver nitrate
1 mol/L hydrochloric acid
0.2 mol/L copper (II) nitrate
0.1 mol/L potassium iodide
0.1 mol/L sodium hydroxide
0.5 mol/L copper (II) sulfate
0.1 mol/L iron (III) nitrate
-
0.2 mol/L calcium nitrate
calcium metal
sulfur
magnesium metal
copper (II) sulfate (solid)
SAFETY PRECAUTIONS
 There are corrosive chemicals (do not touch or spill on hands): HCl(aq), NaOH(aq), Ca(s)
 Ensure you are wearing your aprons. There are chemicals that stain hands and clothes:
AgNO3(aq), CuSO4(aq), and Fe(NO3)3(aq)
 For Part E, do not stare directly at the reaction (UV light)
PROCEDURE
Part A:
1. Place 5 drops of the first aqueous reactant in a clean test tube.
2. Place 5 drops of the second aqueous reactant in the same test tube, mixing the two
together.
3. Record your observations.
4. Dispose of product solutions in the designated “Aqueous Solutions Waste Beaker” on
the teacher’s desk.
5. Repeat Steps 1-4 for each of the following aqueous solution combinations.
(A) sodium carbonate and silver nitrate
(B) hydrochloric acid and sodium carbonate
(C) copper (II) nitrate and potassium iodide
(D) sodium hydroxide and copper (II) sulfate
(E) sodium hydroxide and iron (III) nitrate
(F) calcium nitrate and sodium carbonate
Part B:
1. Place one small piece of metal in a clean test tube.
2. Add a few drops of each aqueous reactant into the same test tube.
3. Record your observations.
4. Dispose of product solutions in the designated aqueous solutions “Waste Beaker” on the
teacher’s desk. Dispose of the solid products in the designated “Metal Waste Beaker”
on the teacher’s desk.
5. Repeat Steps 1-4 for each of the following combinations.
(G) copper (II) sulfate
and iron
(H) silver nitrate
and copper
(I) iron (III) nitrate
and copper
Part C:
1. Measure a scoopula tip of solid copper (II) sulfate pentahydrate into a clean dry test
tube.
2. Using a test tube holder, hold the test tube and contents at an angle away from
yourself and any of your classmates.
3. Using a Bunsen burner, heat the test tube gently over the Bunsen burner until no
further change is noticed. (Reaction J)
4. Turn off the Bunsen burner and let the solid cool for approximately 2-3 minutes.
5. Use a distilled water bottle to add 3 or 4 drops of water to the test tube. Note any
observations. (Reaction K)
Part D (Reaction L):
1. Place a small scoopula tip full of sulfur and one piece of calcium into a clean dry test
tube.
2. Place a cotton plug at the top of the test tube.
3. Heat vigorously over the Bunsen burner.
4. Note any observations.
Part E (Reaction M and N):
1. Take a small piece of magnesium and burn the small piece of magnesium directly in the
Bunsen burner flame using a pair of crucible tongs.
2. Place the burned product on an evaporating dish.
3. Note any observations.
4. Add 5 mL of distilled water to the previous product and stir with the end of a glass
stirring rod.
5. Add two drops of phenolphthalein to the mixture.
6. Note any observations
EVALUATION
Laboratory Instructions:
Complete the following charts by observing the chemical reactions. Include observations of the reactants
and products (describe using chemical and physical properties), indicate which clues of a chemical
reaction you observed (be specific), write a chemical skeletal equation for the reaction, write a balanced
chemical equation for the reaction and finally indicate the type of reaction that has occurred. If there is a
more specific kind of reaction, please specify it.
Reaction
Category
Descriptor
Part A
Thinking and
Investigation
/12
Communication
/18
Part B
Thinking and
Investigation
/6
Communication
/9
Part C
Thinking and
Investigation
/4
Communication
/6
Parts
D and E
Thinking and
Investigation
/8
Communication
/12
Mark
 Physical Properties of Reactants and
Products
 Evidence of Chemical Reaction
0
1
2
3
4
5
6
0
1
2
3
4
5
6



0
0
0
1
1
1
2
2
2
3
3
3
4
4
4
5 6
5 6
5 6
Word Equation
Balanced Chemical Equation
Type of Chemical Reaction
 Physical Properties of Reactants and
Products
 Evidence of Chemical Reaction
0
1
2
3
0
1
2
3



0
0
0
1
1
1
2
2
2
3
3
3
Word Equation
Balanced Chemical Equation
Type of Chemical Reaction
 Physical Properties of Reactants and
Products
 Evidence of Chemical Reaction
0
1
2
0
1
2



0
0
0
1
1
1
2
2
2
Word Equation
Balanced Chemical Equation
Type of Chemical Reaction
 Physical Properties of Reactants and
Products
 Evidence of Chemical Reaction
0
1
2
3
4
0
1
2
3
4



0
0
0
1
1
1
2
2
2
3
3
3
4
4
4
Word Equation
Balanced Chemical Equation
Type of Chemical Reaction
TOTAL MARK:
Thinking and Investigation
Communication
/30
/45
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