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Lekce 4
Acids and bases: the pH scale
📖 Lekce
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🎯 Kvíz — vyber překlad
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✅ Lekce hotová
A lemon is sour — an acid, soap is slippery — a base. Scientists measure with the pH scale: 0–6 acid, 7 neutral, 8–14 base.
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Kyselina (citron)
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Zásada (mýdlo)
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Neutrální (voda)
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Ocet
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Soda
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Amoniak
💡 Acid + base = salt + water. That is how baking soda fights heartburn!