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Chalk Demonstration

Published on Mar 29, 2014

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PRESENTATION OUTLINE

1.

Chalk Demonstration

HOW MANY MOLES OF CHALK DOES IT TAKE?
Photo by Nina Matthews Photography
2.

QUESTION

HOW MANY MOLES ARE NEEDED TO WRITE YOUR NAME ON THE CHALK BOARD?
Photo by Scott McLeod
3.

PROCEDURE

  • Acquire chalk
  • Weigh chalk
  • Write first & last name on the board
  • Weigh chalk
  • Repeat steps 3 & 4
Photo by -Reji
4.

DATA FOR TRIAL 1

ZERO THE BALANCE EACH TIME.
5.

DATA FOR TRIAL 1

INITIAL WEIGHT
6.

CHALK TRIAL 1

7.

DATA FOR TRIAL 1

FINAL WEIGHT
8.

DATA FOR TRIAL 2

USE THE SAME BALANCE FOR EACH TRIAL.
9.

DATA FOR TRIAL 2

INITIAL WEIGHT
10.

CHALK TRIAL 2

11.

DATA FOR TRIAL 2

FINAL WEIGHT
12.

DATA FOR TRIAL 3

13.

DATA FOR TRIAL 3

INITIAL WEIGHT
14.

CHALK TRIAL 3

15.

DATA FOR TRIAL 3

FINAL WEIGHT
16.

DATA CHART

  • Includes initial & final weights
  • Subtract and find difference
  • Find the average difference
  • Use average to calculate
Photo by Doun Dounell
17.

CALCULATE THE FOLLOWING

  • # Mole
  • # Molecules
  • # Atoms
  • # Ions
  • # Liters
  • Remember this is for calcium carbonate. (Chalk)
Photo by Mick E. Talbot

Becky Parry