Phosphoric acid (H3PO4) is a weak acid naturally found in the body that supports kidney function and also involved in fat storage. It is a weak acid with a Ka value of 6.9×10-3 at STP. (i) Determine the H+ concentration of a 0.25 M solution of phosphoric acid at STP (assume that the acid is monoacidic). (ii) Calculate the pH of the 0.25 M H3PO4 solution at STP. (iii) What effect on the pH of the solution would you expect to observe if the temperature of the weak solution was increased. Give a brief explanation for your answer.
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- Phosphoric acid (H3PO4) is a weak acid naturally found in the body that supports kidney function and also involved in fat storage. It is a weak acid with a Ka value of 6.9×10-3 at STP.
(i) Determine the H+ concentration of a 0.25 M solution of phosphoric acid at STP (assume that the acid is monoacidic).
(ii) Calculate the pH of the 0.25 M H3PO4 solution at STP.
(iii) What effect on the pH of the solution would you expect to observe if the temperature of the weak solution was increased. Give a brief explanation for your answer.
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