Calculate $ \left[\mathrm{OH}^{-}\right] \times 10^{8} $ for a solution whose $ \mathrm{pH} $ is $ 6.2 $. GIve your answer up to two significant figures.

Question

Calculate $ \left[\mathrm{OH}^{-}\right] \times 10^{8} $ for a solution whose $ \mathrm{pH} $ is $ 6.2 $. GIve your answer up to two significant figures.,

MARKS App · Accepted Answer

Given: pH = 6 . 2 In the pH scale, pH + pOH = 14 pOH = 14 - 6 . 2 = 7 . 8 pOH = - log OH - = 7 . 8 ⇒ log OH - = - 7 . 8 = 0 . 2 - 8 OH - = 1 . 6 × 10 - 8 1 . 6 × 10 - 8 M

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