Lemons are sour, soap is slippery: they sit at opposite ends of the pH scale. Sort, test with red cabbage juice and neutralise in the kitchen lab!
🌈 Your pH poster
⚠️ Never taste lab liquids or cleaning products, and never mix cleaning products. If a chemical gets in an eye, rinse it with clean water straight away for at least 15 minutes and get a grown-up to call for help.