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The concentration of acetic acid (K(a)=1...

The concentration of acetic acid `(K_(a)=1.8 xx 10^(-5))` required to give `3.5 xx 10^(-4) ` moles `//` litres of `H_(3)O^(+)` ions is

A

6.8 mol/L

B

`6.8xx10^(-3) mol//L`

C

`1.94 xx 10^(-1) mol//L `

D

194 mol/L

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The correct Answer is:
b
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