Engage your students with this NO PREP, interactive chemistry cipher activity focused on solution concentration and dilutions, including molarity, percent by mass, percent by volume, parts per million, and dilution calculations.

In this structured challenge, students solve clues by calculating the correct concentration answer with units, rewriting the number only, and then converting that number into a letter using the provided number-to-letter chart. After each answer, they gradually reveal a hidden message.

Students must use their understanding of concentration calculations to crack the code. As they work through each clue, they strengthen essential chemistry skills while building toward the hidden message.

✅ NO PREP, NO MATERIALS, NO MARKING - Simply ready to use!

No materials, no setup, no stress. Just print or assign digitally and go.

What Students Will Learn

• How to calculate molarity
• How to calculate percent by mass
• How to calculate percent by volume
• How to calculate parts per million (ppm)
• How to use the dilution relationship for changing concentration and volume
• How to connect chemistry calculations to clues and patterns in a puzzle format

This cipher activity is also part of my Chemistry Concepts Cipher Puzzle Bundle where you can find all my physics calculation cipher activities at a significant discount.

This activity combines chemistry content, logic, and problem-solving into one engaging experience that students actually enjoy. Rather than simply memorizing formulas, students actively apply their knowledge of concentration calculations and dilution relationships to solve problems. This activity reinforces key chemistry vocabulary, supports pattern recognition, and keeps students engaged through puzzle-based learning.

What’s Included

• A complete Solution Concentration & Dilutions Cipher Puzzle worksheet (26 clues)
• Clear student instructions for solving and decoding
• A hidden message challenge to increase engagement
• A full answer key with all solutions and number-to-letter conversions
• Print and digital-friendly formats

Why Teachers Love This Resource

• Zero prep – just print and go
• High engagement through puzzle-based learning
• Reinforces concentration and dilution calculation skills
• Encourages critical thinking and independence
• Great for review, stations, early finishers, or sub plans

Time Required

• 30–45 minutes
• Can be extended with small group discussions or a whole-class review

No prep, no formatting, no issues. Simply download, print (or upload), and you're all set.

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If you have any questions please feel free to send me an email - devon@teachwithfergy.com