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Which number represents an acidic pH, 4 or 9?
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1 vote
Which number represents an acidic pH, 4 or 9?

User Vyclarks
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5 votes
pH4. Acids are from pH 0 to 6.
User SmartTree
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2 votes
acids have ph less than 7 and alkali have ph more than 7

User Yaroslav Basovskyy
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