Safe project plan for a 13‑year‑old: electrolysis, hypochlorous chemistry, hydrogen water, distillation, and MEL Science kit links

Overview

This is a student‑friendly, safety‑first explanation of the ideas behind the things you listed and how they connect. I will explain what each experiment demonstrates, what the important safety issues are, and a safe, supervised plan you can follow with help from an adult or teacher. I will not give step‑by‑step recipes for making hazardous chemicals or producing gases that can be dangerous — instead I will focus on the science, safe alternatives, measurements you can make, and how to combine the ideas for a school project.

Safety first — read this with an adult

• Always work with a knowledgeable adult present (teacher, parent experienced in lab work, or lab technician).
• Wear safety goggles, gloves, and an apron or lab coat. Work where there is good ventilation (open window or fume hood if one is available).
• Some processes on your list can make dangerous substances: mixing acids and bleach or electrolyzing salty water can release chlorine gas; making hydrogen involves flammable gas. Do NOT try to make chlorine gas or light any gas. If you smell a strong bleach or chlorine odor, leave the area immediately and get adult help.
• Use only commercial, properly labeled reagents and the materials and instructions that come with educational kits (like the MEL Science kits). Follow the kit safety instructions exactly.
• Never dispose of chemicals down the sink without checking rules for disposal — ask your teacher or local waste guidelines.

What each item shows (concepts and chemistry)

• Salt‑water electrolysis / hypochlorite / hypochlorous acid: Electrolysis splits ions in water using electricity. In salty water you have sodium (Na+) and chloride (Cl−) ions; under some conditions the chemistry leads to oxidizing species such as hypochlorite (OCl−) and hypochlorous acid (HOCl). The balance between hypochlorous acid and hypochlorite depends a lot on pH — lower pH (more acidic) shifts toward HOCl, higher pH toward OCl−. These species are disinfectants and bleach‑type chemicals. Important idea: pH affects chemical equilibria and the oxidizing power of chlorine‑containing compounds.
• Hydrogen water generator: Devices that produce dissolved hydrogen in water do so by electrochemical means or by reacting certain metals with water in a controlled way. The important chemistry idea is that electrochemical reactions can produce gases (hydrogen, oxygen) and dissolved species. Hydrogen is flammable — do not try to collect and ignite gases at home.
• Water distiller: Distillation takes advantage of different boiling points to separate water from dissolved minerals and many impurities. Distilled water is often purer and can be used when you want to control what ions are present in your experiments (for example, to make a salt solution with only known ions).
• MEL Science corrosion and electricity kits (rust protection, electricity vs iron, lemon battery, Daniel cell): These kits demonstrate corrosion (iron reacting with oxygen/water to make rust), how protective coatings slow corrosion, and basic electrochemistry where chemical differences create an electric potential (galvanic cells). The lemon battery and Daniel cell show how two different metals and an electrolyte produce a voltage. These are safe, educational examples of redox chemistry and electricity generated from chemical reactions.

How these ideas connect — big picture

• All of these experiments are about electrons and chemical change: electrolysis forces chemical change by supplying electricity; galvanic cells (like the Daniel cell or lemon battery) produce electricity because chemical reactions move electrons.
• Corrosion is an electrochemical process: iron loses electrons (oxidizes) and something else gains electrons (reduces). That links directly to the galvanic cells you can make with metals in the MEL kits.
• pH and chemical equilibrium affect which species are present (for example, HOCl vs OCl−). Measuring pH and chlorine concentration is a safe, scientific way to learn how conditions change chemistry without trying to make concentrated disinfectants at home.
• Distilled water gives you a known starting point (few dissolved ions) so you can add a known amount of salt or acid and study predictable effects.

Safe ways to explore these connections (recommended approach)

1. Start with the MEL Science kits — follow the instructions and learn about corrosion, metal reactivity, and galvanic cells. These kits are designed for safe hands‑on learning with clear safety guidance.
2. Use distilled or bottled water when you need a controlled solution. That helps you understand the effect of adding salt or acid without unknown impurities.
3. Measure, don’t make risky chemicals: if you want to study how pH changes the amount of hypochlorous acid vs hypochlorite, use safe, low‑concentration, commercially prepared test solutions or household bleach diluted per label instructions and only under adult supervision. Better yet, use commercial chlorine test strips and pH strips to observe differences in concentration and pH rather than trying to generate disinfectants yourself.
4. Explore electrochemistry conceptually and safely: use the lemon battery and Daniel cell to learn how voltages depend on metal combinations and electrolytes. Compare what happens when you use different salts or different fruits — but follow the kit rules and avoid homemade high‑voltage setups.
5. Investigations you can do safely and learn a lot from:
   • How does adding a little salt to distilled water change its ability to conduct electricity (use a low‑voltage, educational conductivity meter or the kit’s guidance)?
   • How does pH (measured with pH paper or a meter) relate to the color changes or test strip readings for chlorine in a commercial solution? (Use commercial, labeled test solutions and strips.)
   • How do different coatings slow rusting in the corrosion kit? Test and record which coatings work best.
   • How does voltage from a lemon battery compare to that from a Daniel cell? Record voltages and explain why they differ (different metals and different electrolytes).

Suggested supervised investigation plan (high level steps)

1. Plan with your adult supervisor: decide which safe questions you want to answer (for example, "How does pH affect chlorine test results in a prepared sanitizer solution?").
2. Gather safe materials: MEL Science kits, distilled bottled water, pH strips, chlorine test strips, small sealed containers, gloves, goggles, notebook. Use only commercially labeled reagents if needed.
3. Perform control experiments from the kit instructions and record observations (photos, data, voltages from the kit meters if provided).
4. Make small, supervised measurements: measure pH, measure chlorine levels (with test strips), measure voltages from the galvanic cells. Record all results and repeat to check consistency.
5. Analyze your data: make graphs or tables (for example, pH vs chlorine test reading, or metal pair vs voltage) and write a short conclusion about what you learned.

What NOT to do (important!)

• Do not mix household bleach (hypochlorite) with acids (this releases chlorine gas, which is toxic).
• Do not attempt to collect or ignite hydrogen gas produced in experiments. Hydrogen is flammable and can cause explosions if ignited.
• Do not try to build high‑voltage electrolytic cells at home, or to perform industrial‑scale electrolysis. Keep experiments small, low‑risk, and supervised by an adult.
• Do not dispose of chemical wastes down the drain without adult guidance — check local disposal rules.

Questions to explore and write about

• How does pH change the equilibrium between HOCl and OCl− and why does that matter for disinfectant strength? (Look this up and explain it qualitatively.)
• How are electrolysis and galvanic cells similar and how are they opposite? (One uses electricity to drive reactions; the other produces electricity from reactions.)
• How does removing dissolved ions (by distillation) change the behavior of an electrolyte solution in a galvanic cell or electrolysis experiment?
• How do coatings and different metals affect how quickly iron rusts? Which methods are most effective and why?

Resources and next steps

• Follow all MEL Science kit manuals and safety worksheets.
• Ask a science teacher or local community college lab for supervised access to equipment if you want to do more advanced measurements.
• Use reliable references: school textbooks, reputable websites for pH and chlorine chemistry, and material safety data sheets (MSDS) for any chemicals you handle (with adult help).

Short conclusion

You can learn a lot by combining ideas from electrolysis, hypochlorous chemistry, hydrogen generation, distillation, and galvanic/corrosion experiments — but safety is the top priority. Use the MEL Science kits and commercial test strips, work with distilled water for controlled tests, measure pH and chlorine levels rather than trying to produce concentrated disinfectants, and always work with an adult. Focus on observing, measuring, and explaining the chemistry rather than making potentially hazardous substances or gases.

If you want, tell me which exact question you want to answer (for example, "How does pH change chlorine test readings using a commercial sanitizer?" or "Compare voltages from 3 different metal pairs in the Daniel/lemon style experiments") and I will help you design a safe, supervised investigation plan and a list of materials and measurements that are appropriate for a 13‑year‑old.