CURRICULUM MAP: 10446.map
Chemistry I (ACP) 521
Unit 10 Colligative Properties
TIME FRAME:
GRADE: 11-12
CONTACT:
MAP LEVEL: 4
In what ways are colligative properties used in everyday life?
Dissociation of ionic compounds in solution
Freezing point depressions and boiling boint elevation
Making ice cream
Write dissociation equations of any soluble ionic solid
Calculate the total number of moles of ions produced by dissociation
Use fp depression and bp elevation constants to determine the new freezing point or boiling point of a solution
Determine which solution would have the biggest effect on the melting point or boiling point of an aqueous solution
Calcuate the mass of salt which needed to dissolve to produce the freezing point acquired in the ice cream lab
Read about colligative properties and their use in everyday life
Practice writing dissocation equations and calculating the number of moles of ions produced
Make ice cream in the lab and use a temperature probe and CBL to obtain data of the temperature changes in the ice-salt mixture
Download data to a computer and prepare a graph of the temperature vs. time during the making of the ice cream
Draw the best fit curve on the graph
Use the freezing point depression obtained from the graph the determine the mass of salt which dissolved to cause this temperature change
Performance based grading of ability to collect data using a CBL and to down-load the data to a computer and prepare a graph
Calculations using fp and bp depressions constants for water
Lab report
Assessment is based on a total point system. Lab reports range between 50 and 100 points. Quizzes range between 10 and 25 points. Tests range between 100 and 200 points. Homework ranges between 5 and 15 points. Performance based grading ranges between 5 and 20 points.
Lab written by S. Pratt
Directions for downloading data from the CBL developed by V. May and S. Pratt