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Chemical Reactions & The molePowerPoint Presentation

Chemical Reactions & The mole

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Presentation Transcript

Catalyst

Objective: I can balance chemical equations.

- Agenda:
- Catalyst
- Bubble Gum Lab
- Mole Quiz #2 & Chemical Reactions

How many molecules are in 2 moles of H2O?

How many atoms are in 2 moles of H2O?

2 mol x 6.02 x 1023molecules = 12.04 x 1023 1 mol

Then, for the second question, first we find the number of atoms in a molecule of water. There are 3.

Then, this means that for every mole of water there are 3 moles of atoms. To get the final answer, multiply the answer from number 1 by 3.

3 x 12.04 x 1023 = 36.12 x 1023 atoms

Bubble Gum!

Objective: I can balance chemical equations.

- Agenda:
- Catalyst
- Bubble Gum Lab
- Mole Quiz #2 & Chemical Reactions

Focus Question: What does bubble gum have to do with chemistry?

http://www.youtube.com/watch?feature=endscreen&NR=1&v=gCnOmYsAiPU

Homework Review

- What is the molar mass of sucrose (C12H22O11)?
- Answer:
- C= 12 x 12 = 144 g
- H = 1 x 22 = 22 g
- O = 16 x 11 = 176 g
- Total mass = 342 g/mol

Homework Review

Objective: I can balance chemical equations.

- Agenda:
- Catalyst
- Bubble Gum Lab
- Mole Quiz #2 & Chemical Reactions

2) What is the mass of 2 moles sucrose?

Answer: 2 mol x 342 g/mol = 684 g

3) You have 5 g sucrose, how many moles do you have?

Answer: (5 g) x 1 mol= 0.015 mol

342 g

Bubble Gum Lab

Objective: I can balance chemical equations.

- Agenda:
- Catalyst
- Bubble Gum Lab
- Mole Quiz #2 & Chemical Reactions

Groups of 4 or 5 at your table

Review and assign group roles (5 min)

Read and complete Pre-Lab Questions (5 min)

Read and complete Laboratory Question, Safety Precautions, Materials (5 min)

Procedure! Read entire procedure and review the data tables with your group before you begin. (7 min)

Complete lab and collect data. (20 min)

After completing your data collection and analysis, check your work with Ms. Boon and then pick up the post lab questions.

Mole Quiz #2 and Chemical Reactions Quiz

Objective: I can balance chemical equations.

- Agenda:
- Catalyst
- Bubble Gum Lab
- Mole Quiz #2 & Chemical Reactions

Ms. Boon will pass out your Mole Quiz #1 answer sheet.

If you scored 0/5, 1/5, 2/5 or 3/5, redo the section. Choose at least 3 new questions that you did not attempt before.

All answers will be written in the answer sheet.

Complete the entire Chemical Reactions Quiz. Fill in your answers on the answer sheet.