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The hydronium ion concentration in an aqueous solution is [H+] = 5.3 x10-4 M. What is the hydroxide ion concentration? Is this solution acidic or basic?

A.) [OH-] = 1.9 x10-11 M, acidic

B.) [OH-] = 4.7 x10-6 M, basic

C.) [OH-] = 1.1 x10-9 M, acidic

D.) [OH-] = 3.2 x10-8 M, acidic

Respuesta :

Answer:a

Explanation:

Given

[tex][H^+]=5.3\times 10^{-4}\ M[/tex]

and [tex]pH+pOH=14[/tex]

Also [tex]pH=-\log [H^+][/tex]

therefore [tex]pH=-\log (5.3\times 10^{-3})[/tex]

[tex]pH=-(-4-\log (5.3))[/tex]

[tex]pH=3.275[/tex]

Thus [tex]pOH=14-3.275[/tex]

[tex]pOH=10.275[/tex]

and [tex]pOH=-\log [OH^{-}][/tex]

[tex][OH]^{-1}=10^{-10.25}[/tex]

[tex][OH]^{-1}=1.88\times 10^{-11}\ M[/tex]

As the pH is less than 7 therefore solution is acidic

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