Bleach Power Worksheet
Bleach Power Lab
Name:
Date:
Safety First: Bleach is strong. We must be careful!
Safety Rules
Wear goggles.
Wear gloves.
What we need:
Bleach
Dark Cloth
Dropper
Timer
My Guess:
What will happen to the cloth?
No change
Color change
Steps to follow:
1
Lay the dark cloth on the table.
2
Put 1 drop of bleach on the cloth.
3
Wait 1 minute. Watch the color!
Big Word Alert: Oxidizer
Bleach is an oxidizer.
This means it steals the color away from things!
What did you see?
Before (Start)
The cloth was _______.
After (Finish)
The cloth turned _______.
Why is bleach dangerous?
Bleach is so strong it destroys color. It can also hurt your:
Eyes
Skin
Lungs
Bleach Power Teacher Guide
Teacher Facilitation Guide
Bleach Power Lab
Learning Goals
- Identify bleach as a powerful chemical (oxidizer).
- Observe physical change (discoloration) as evidence of chemical power.
- Follow multi-step lab safety protocols (goggles, gloves).
ID Support Strategies
- Modeling: Demonstrate the "one drop" technique before students begin.
- Visual Timers: Use a physical or digital timer for the 1-minute wait.
- Guided Observation: Point out the exact moment the color begins to lift.
How to Explain "Oxidizer"
Choose the level that best fits your students' cognitive needs:
Teacher Reference
The Concept
Oxidizers pull electrons away from other substances, breaking chemical bonds.
Level 1 Analogy
The Magnet
Bleach is like a magnet that pulls the color out of the fabric.
Level 2 Analogy
The Thief
Bleach is an "invisible thief" that steals the bright colors and leaves things white.
Discussion Prompts
During Step 2:
"What color is the cloth now? What color do you think it will be when the bleach touches it?"
After Step 3:
"Did the color go away? If bleach does this to clothes, what would it do to your skin?"
Differentiation & Extension
For Limited Mobility:
Allow students to use a spray bottle (coarse stream) from a safe distance rather than a precise dropper, with staff assistance.
Extension Idea:
Test other dark items (denim, construction paper, colored napkins) to see if some dyes are stronger than others.
The Science Simplified
Bleach contains Sodium Hypochlorite. It works by breaking the chemical bonds of chromophores (the part of a molecule responsible for its color). This is called oxidation. For our students, we describe this as bleach being strong enough to eat the color away.
