The pH scale
Acids and bases are at opposite ends of the pH SCALE, and this puzzle gathers the chemistry. You'll be finding the two extremes — the sour ACID and the soapy BASE or ALKALI — plus the NEUTRAL point in the middle, and the way we test them with LITMUS and a UNIVERSAL INDICATOR.
Because every new puzzle reshuffles the lab, no two acids and bases word searches are the same. One round a backwards CORROSIVE hides in a corner; the next a diagonal INDICATOR appears across the middle.
Everyday chemistry
Acids and bases are all around us, and the words are here. Acids taste SOUR — think VINEGAR and LEMON — and a STRONG one like SULFURIC acid is CORROSIVE. Bases feel slippery — like SOAP, BLEACH and AMMONIA. We've hidden the lab words too: the chemical REACTION between them, the SOLUTION you DILUTE, the HYDROGEN that makes an acid acidic, and the BITTER taste of a base.
It's a great fit for a chemistry topic. Tracking down I-N-D-I-C-A-T-O-R turns spelling practice into an experiment.
How to play
Drag across a word, or click its first and last letter — both work. Each word you spot locks in with its own colour and ticks off the list, so you always know what's left to find.
Want a real challenge? Switch to Medium or Hard for a bigger grid with diagonals and reverse words. Stuck on one? Tap Hint for a nudge, or Solve to reveal them all at once.
Print an acids & bases word search pack
Tap Download for a printable PDF of fresh acids and bases puzzles, with optional answer keys. Choose how many you want and how many per page — perfect for a chemistry topic, a classroom, or a quiet afternoon.
Teachers love these for chemistry lessons on the pH scale. Add a name-and-date line and you've got ready-to-print worksheets in seconds, free and account-free.
Frequently asked questions
What's in the acids & bases word search?
The pH scale — acids and bases, alkalis and neutral, plus litmus, indicators and everyday examples like vinegar, lemon, soap and bleach. Each puzzle uses a fresh mix.
Is the acids & bases word search free to print?
Yes. Play free online or download a printable PDF pack with optional answer keys — no sign-up required.
Is it suitable for kids?
Absolutely. Easy mode keeps the grid small with no diagonals or reverse words, perfect for a chemistry lesson and young learners.