Chemistry experiments
Middle school chemistry:
8 hands-on experiments.
The textbook classics across acids, bases and solutions, and matter and its changes. The materials come mostly from the kitchen and the stationery shop, and the safety notes come first in every guide.
Acids, Bases & Solutions
Red Cabbage pH Indicator: See Acids and Bases at Home
A single leaf of red cabbage makes an indicator that reports acidity in living color. Red, purple, blue, green — the shifting hues turn the abstract idea of acids and bases into something you can watch happen.
How Much Salt Can Water Hold? Saturated Solutions and Crystallization
How much salt can water dissolve? At which spoonful does it start piling up on the bottom of the glass, refusing to budge? That moment — when no more will go in — is the very definition of saturation.
Mix a 6% Salt Solution: How to Calculate and Prepare a Given Mass Percent
"Prepare 50 g of a 6% sodium chloride solution." Hidden inside that sentence are two numbers: 3 and 47. The hard part isn't the arithmetic — it's knowing why those are the numbers.
Matter and Its Changes
Make Carbon Dioxide with Baking Soda and Vinegar: Three Property Tests
Mix two kitchen staples and you have a cupful of invisible gas — one that can smother a candle flame and turn limewater milky white. Every key property of carbon dioxide is hiding inside these small phenomena.
Why Does a Candle Go Out? The Fire Triangle and Three Ways to Put Out a Fire
Take one lit candle: cover it with a glass and it dies, blow on it and it dies, snip away the wick and it dies. Three ways of killing a flame — and behind them, three directions of one single rule.
Split a Glass of Water with Pencil Leads: The Negative Electrode Collects Twice the Gas
Water looks like one single thing. Run electricity through it, and it splits into two on the spot — in proportions so fixed they might as well have been weighed out.
Why Ice Stays at 0 °C While It Melts: Water's Three States of Matter
You keep on heating, yet the thermometer sits motionless at 0 °C. The thermometer isn't broken — you are looking at the single most important rule of how crystals melt.
Build an Atom from Modeling Clay: Protons, Neutrons, Electrons and Elements
You can't see an atom — but you can build one. Press a seventh proton into the nucleus and the "carbon" in your hands turns into "nitrogen." What decides which element an atom is suddenly becomes obvious.
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