p H of a 1 0 - 10 M N a O H is nearest to:

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Question: Answered & Verified by Expert

p H

of a

1 0^{- 10} M

N a O H

is nearest to:

ChemistryIonic EquilibriumNEET

Options:

A 10
B 7
C 4
D 10.9

Solution:

1996 Upvotes Verified Answer

The correct answer is: 7

Apply common ion effect total

[O H^{-}] i o n = 1 0^{- 10} + 1 0^{- 7}

p O H = - l o g (1 0^{- 10} + 1 0^{- 7})

(∴ 10^{- 10} < < 10^{- 7})

[{OH}^{-}] = 10^{- 7}

pOH ≃ 7

pH ≃ 7

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