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At 25 degrees Celsius an acidic solution has a hydronium ion molarity:
AAlways exactly zero
BGreater than 1.0e-7 M
CSmaller than 1.0e-7 M
DExactly 1.0e-7 M
Answer & Solution
Correct answer: B. Greater than 1.0e-7 M
1. Neutral water at this temperature holds hydronium at 1.0 times ten to the minus seven molar.
2. Acidic solutions are those with hydronium ion molarities greater than that figure.
3. Their hydroxide ion molarities are correspondingly less than 1.0 times ten to the minus seven molar.
4. That corresponds to pH values less than 7.00 and pOH values greater than 7.00.
_Source: OpenStax Chemistry 2e (CC BY 4.0), Ch 14 'Acid-Base Equilibria', sections 14.1-14.7_
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