Reactions: acids, bases, pH

📖 Lesson ──▶ 🎯 Quiz — pick the translation ──▶ ✅ Lesson done

A chemical reaction rebuilds atoms: reactants → products. Acids taste sour (lemon, vinegar, cola), bases feel soapy (soap, baking soda, cleaners). The pH scale runs 0–14: below 7 acid, 7 neutral (water), above base. Acid + base = salt + water: neutralization.

●pH 0–6: cola ~2.5, lemon ~2, rain ~5.5
●pH 7: pure water and blood (nearly, ~7.4)
●pH 8–14: soap ~10, bleach ~13

🥼 Red-cabbage indicator: the juice shifts red with acid, green with base. A home lab!

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Test yourself!

Practice the topic with the trainer — like after class

Quiz — pick the translation → 🖨 Worksheet

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