Answer:
[H⁺] = 3.548 x 10⁻⁴ M.
Step-by-step explanation:
∵ pH = -log[H⁺]
∴ 3.45 = -log[H⁺]
log[H⁺] = -3.45
∴ [H⁺] = 3.548 x 10⁻⁴ M.
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