STEAM: Chemical Glass Etching - Chemical or Physical Change?

School:: Palmetto Ridge High
Subject:: Stem
Teacher:: Allison Chapman
: Curtis F. Chapman, Ph.D.
Students Impacted:: 1600
Grade:: 9-12
Date:: August 25, 2019

Investor

Thank you to the following investor for funding this grant.

Woodward, Pires & Lombardo, PA - $215.00

Impact to My Classroom

# of Students Impacted: 1600

Only about 14-20 students in the Chem Club and in my 7th period class made candles with me before school, during lunch, during a class field trip they were unable to attend and after school this year before the quarantine. This was an activity that I had planned to do after Spring Break.

Original Grant Overview

Goal

Students will learn the difference between chemical and physical changes while studying chemical reactions and creating a memento to take home.

What will be done with my students

Students will watch a short video on the use of sand blasting to etch glass and then compare it to chemical glass etching.

They will then choose a stencil and a glass item to chemically etch.

Students will adhere the stencil on the glass surface they wish to etch and apply masking tape all around the stencil to protect the glass.

While wearing gloves and goggles, the students will carefully apply the etching compound and leave it on the surface for 2-3 minutes.

Finally, the students will completely rinse the etching compound off their item, wash it off, and write about the process in their interactive journals.

Benefits to my students

Students will observe the difference between physically and chemically etching glass first hand. They will be able to discuss the chemical process used to etch the design in the glass. Not to mention, they will have a piece of art to take home.

Budget Narrative

We have all the chemicals and some of the materials to perform this lab experiment but need more glass and reusable/custom stencils ($200). Special thanks to Dr. Raabe, Chef Wilkey and The Chapman Family for donations of cash and glass in the past.

Items

#	Item	Cost
1	Glass Votive Holders	$172.00
2	Reusable Stencils ($7 each)	$28.00
3	chemical etching compound	$0.00
4	Exacto Knife to cut custom stencil designs	$0.00
5	Masking Tape	$10.00
6	bulletin board posters describing the experiment	$0.00
7	tax	$12.60
	Total:	$222.60

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