The pH value

Chemistry Level 1

What will be the pH of 10^{-8} M HCl?

5.26 7.89 6.89 7 6.98

Anurag Bisht by Anurag Bisht , 17, India

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1 solution

Marc Fernández
Dec 14, 2017

[ H + ] = [ O H − ] + [ C l − ] = K w [ H + ] + [ C l − ] [H^{+}]=[OH^{-}]+[Cl^{-}]= \frac{Kw}{[H^{+}]}+[Cl^{-}]

K w = 1 0 − 14 , [ C l − ] = 1 0 − 8 M Kw= 10^{-14}, [Cl^{-}]= 10^{-8} M

[ H + ] = 1 , 0512 ⋅ 1 0 − 7 M [H^{+}] = 1,0512 ·10^{-7} M

p H = − l o g [ H + ] = 6.98 pH=-log[H^{+}]= 6.98

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