0-2 pH - strong acid (gastric acid), 3-4 pH - moderate acid (lemon juice), 5-6 pH - weak acid (vinegar), 7 pH - neutral (water), 8-9 pH - weak base (baking soda), 10-11pH - moderate base (ammonia), 12-14 pH - strong base (bleach),

pH scale: acid/base sort

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