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📘 DAT Daily Practice — pH Question
Here's a great no-calculator-style problem students should be ready for:


What is the concentration of hydrogen ions at pH 5.7?

A) 7.0 × 10⁻⁵ M
B) 2.0 × 10⁻⁶ M ✅
C) 1.0 × 10⁻⁵ M
D) 1.0 × 10⁻⁶ M
E) 3.0 × 10⁻⁵ M


Correct answer: B
Don’t forget on the real DAT, these no-calculator mental math questions come fast. Practice estimating quickly based on pH ≈ –log[H⁺].


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