Lesson Plan : How sweet is your gum?

 Teacher Name: miss houssaiky Grade: Grade 11-12 Subject: Science

 Topic: Percent Composition and empirical formula Content: Chemistry: -percent composition: % by mass of an element in a compound -empirical formula: the formula of a compound using the smallest whole number ratio of the atoms in a compound. Goals: 1. understand percent composition 2. calculate percent composition of an element in a compound or a compound in a mixture.j 3. understand empirical formula 4. write empirical formula using percent composition Objectives: 1. students should be able to determine the percent composition of sugar in a piece of gum. 2. students should be able to write the empirical formula of a compound. 3. Students should be able to use scientific inquiry to learn about % composition and empirical formula. Materials: gum PowerPoint (computer, projector) balance handouts-- activity guidelines paper cups or beakers Introduction: To motivate students i will tell them they will be allowed to chew gum in lab today. i will give thema % comp problem to see if they understood the homework. to focus the students attention i will explain how we can use chemistry to learn something about everyday life-- such as chewing gum. bubble gum is somethings students are familiar with, this will help them connect prior knowledge to this activity. Development: bell work: calculate % comp of Ca in CaCO3 Discuss quiz grades Activity Practice: Students will go over 5 problems as a class. I will then allow them to complete 10 question sheet. I will revolve around the room answering all questions. Checking For Understanding: In the morning we will do a Do now of each of the problem types. Evaluation: This will be part of the unit test at the end of the quarter.