A buffer solution is used in:

preparation of potash alum

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the removal of

{P O}_{4}^{3 -}

ions

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increasing the pH value of a solution

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precipitation of

C r {(O H)}_{3}

from

C r {C l}_{3}

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Solution

The correct option is B the removal of ${P O}_{4}^{3 -}$ ions
$P O_{4}^{3 -}$ removal columns are designed to remove $P O_{4}^{3 -}$ from a buffer solution. For example, the $P O_{4}^{3 -}$ concentration can be reduced from $10 m M$ to lower than $0.001 m M$ . The principle of phosphate removal is based on interactions between $P O_{4}^{3 -}$ and column resin. The $P O_{4}^{3 -}$ stays on the column. Other buffer components including regular buffer salts and non-charged molecules such as sugar and glycerol do not bind to the resin, therefore they stay in the sample solution.

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Similar questions

100 m l

p^{H}

4

1 m l d i l . H C l

p^{H}

p H

1.0 M P O_{4}^{3 -}

p K_{b} o f P O_{4}^{3 -} = 1.62

pH of a buffer solution is

On the addition of a small amount of an acid or a base, the pH value of a buffer solution:

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