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★ High freqpH scale — what does neutral, acidic, basic mean?
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SwaCardspH scale — what does neutral, acidic, basic mean?
pH 7 = neutral; below 7 = acidic; above 7 = basic (alkaline); 0-14 scale.
Stomach acid pH 1-2; blood pH 7.4; seawater pH 8.1; universal indicator shows pH color.
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