An aqueous solution contains 0.28 M hydrofluoric acid. One Liter of this solution could be converted into a buffer by the addition of: (Assume that the volume remains constant amp;s each substance is added ) 0.138 mol KOH 0.14 mol HCIO4 0.29 mol HCIO4 0.28 mol KI 0.29 mol KF
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