Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

Make your likes visible on Facebook?

Connect your Facebook account to Prezi and let your likes appear on your timeline.
You can change this under Settings & Account at any time.

No, thanks

Unit 5: Classifying Reactions Lab

No description
by

Aurora Rodriguez

on 20 December 2014

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Unit 5: Classifying Reactions Lab

End
Please complete this lab assignment in place of the Unit 5: Classifying Reactions lab. You may follow along during the Lab Live Lesson or watch the Lab Help recording posted on the class Message Board. Once you have completed this assignment, please use the Drop Box within the lesson to submit this assignment. Thank you! 
Directions: Please complete the pre-lab questions before moving on to the next sections. For the lab assignment, please follow along with the class to record your hypotheses, observations, and explanations for each experiment. Please make sure to fill everything in and DO NOT leave any blanks!

Pre-lab
Please identify whether the following chemicals are considered an acid or base:
a. H3PO4: Acid b. NaOH: Base c. Ba(OH)2: Base

d. KOH: Base e. HNO3 : Acid f. HCl: Acid

2. Name each of the following chemical formulas:
a. H2SO3: Hydrogen Sulfite b. CaNO2: Calcium Nitrite c. MnCO3: Magnesia Carbonate

d. P2S5 Potassium Sulfate e. H3P: Hydrogen Phosphate f. NH4OH: Nitrogen Hydrogen Hydroxide

3. Find the total molar mass of the following chemicals:
a. CaCl2: 110.98 b. FeSO4: 151.92 c. Al(OH)3: 38.01

d. AgNO3: e. H2CO3: 62.03 f. N2O3: 70.02

4. Calculate the following conversions:
a. 2.75 moles CuCl2 to grams
2.75 moles of CuCl2 x134.57 grams of CuCl2 / I mole of CuCl2
48.93 grams of CuCl2

b. 54.2 grams SiO2 to moles
54.2 grams of SiO2 = 60.09 mole of SiO2 X 54.2 grams of SiO2/ 1 mole
3256.8 moles of SiO2

There are many different types of chemical reactions that can occur, and some of them can even be observed with just a few house hold items!
1. Combination
2. Decomposition
3. Single replacement
4. Double replacement
5. Combustion reaction

Experiment 1 – Steel Wool in Jar
Preliminary Observations
Steel Wool:
1. Wire like
2. Feels spongy- soft
3. Made of steel
4. Light Grey
5. Stretchy
6. Smells metallic
Bowl:
1. Ceramic
2. White
3. Looks like a cereal bowl.
Jar:
1. Clear
2. Empty
Pure distilled white vinegar:
1. Clear
2. Very potent smell
3. Is a Acetic Acid HCH3COO
4. Liquid

Experimental Procedure
1. Rip a small piece of steel wool
2. Flatten the steel wool
3. Take the pure distilled white vinegar
4. Drop the piece of steel wool into a small beaker and poor some vinegar into the small beaker with te steel wool.
5. Soak the steel wool in the vinegar.
6. Pour a small amount of water into the white bowl.
7. Take the steel wool out of the small beaker with vinegar
8. Shake off all the extra vinegar.
9. Tape the steel wool into the bottom of the empty clear jar.
10. Place the jar into the water upside-down.
11. Let it sit for about 20 minutes

Observations of Experiment
1. The Steel wool is turning brown. Means there was a chemical reaction
2. Looks rusty
3. Looks gross
4. Smells like vinegar
5. Feels tough

Data (Chemical Formula)
2Fe+ 3 O2  2Fe2 O3
Fe- 4 Fe-4
O-6 O- 6

1. Which type of chemical reaction occurred in experiment 1?
The chemical reaction that occurred is called Combination or Synthesis.

Experiment 2 – Penny in Vinegar

Preliminary Observations
Lemon:
1. Yellow
2. Has citric acid
Pennies:
1. Silvery
2. Flat
3. Circle shape

Sand paper:
1. Brown
2. Rough
Pure distilled white vinegar:
1. Clear
2. Very potent smell
3. Is a Acetic Acid HCH3COO
4. Liquid

Experimental Procedure

1. Sand down the pennies with sand paper and get rid of the copper; the pennies are now zinc
2. Put a small amount of Acetic acid into a small beaker
3. Cut the lemon in half
4. Juice the lemon into a different beaker.
5. Clean up the lemon juice that may have spilled
6. Drop the pennies into the two different acids
7. Let the pennies sit for a little bit.

Observations of Experiment
Vinegar and penny
1. Silvery
2. Color change
3. Bubbles all around the penny
Lemmon and penny
1. Bubbles around the penny.
2. Cloudy

Data (Chemical Formula)

Zn + 2HCH3COO  H + ZnCH3COO

3. Which type of chemical reaction occurred in experiment 2?
The Chemical reaction that occurred is called Single Replacement.
Experiment 3 – Hydrogen Peroxide with Potato
Preliminary Observations
Hydrogen Peroxide:
1. Brown bottle
2. Clear liquid
3. H2O2
4. looks like water
5. smells like nothing

Red Potato:
1. Small
2. Red
3. Has scratches on it
Petri plate:
1. Clear
2. 2 sides

Experimental Procedure
1. Cut out a small chunk go the potato
2. place the chunk of potato into the Petri plate
3. Drip Hydrogen Peroxide on to the Potato with a pipet.

Observations of Experiment
1. The Hydrogen Peroxide is fizzing and bubbling on the Potato. This means a chemical reaction is occurring and gasses are being produced.
2. Smells like potato

Data (Chemical Formula)

2H2O2 1O2 + 2H2O
H-4 H-4
O-4 O-4

3. Which type of chemical reaction occurred in experiment 3?
The chemical reaction that occurred is called Decomposition.

Unit 5: Classifying Reactions Lab
By: Aurora Rodrguez
Experiment 4 – Baking Soda with Vinegar
Preliminary Observations
Baking soda:
1. Orange box
2. White powder
3. Doesn’t smell like anything

Pure distilled white vinegar:
1. Clear
2. Very potent smell
3. Is a Acetic Acid HCH3COO
4. Liquid

Experimental Procedure

1. Dump a plastic spoon full of baking soda into half of the petri dish.
2. Dump some of the Acetic Acid with the baking soda (dump the vinegar carefully)

Observations of Experiment
1. Bubbling and fizzing
2. The baking soda is being dissolved
3. Looks like Sprite

Data (Chemical Formula)

HCH3COO + Na  H2CO3 + NaCH3COO

4. Which type of chemical reaction occurred in experiment 4?
The chemical reaction that occurred is called Double Replacement.

5. There was a secondary reaction that took place. Write the second chemical reaction below.
H2CO3  H2O + CO2
The secondary reaction that occurred is called Decomposition.

Lab: Classifying Reactions Lab
Directions
For each experiment, record your observations, write out the complete chemical formula, and answer
each follow-up question.
Full transcript