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A phosphate buffer contains KH2PO4 and K2HPO4. What is the net ionic equation for the buffering reaction that occurs when some HCl is added to the buffer solution?           (A) H2PO4–(aq)  +  Cl–(aq)  -->  HPO42–(aq)  +  HCl(aq);           (B) H2PO4–(aq)  +  H3O+(aq)  -->  H3PO4(aq)  +  H2O(aq);           (C) HPO42–(aq)  +  Cl–(aq)  -->  PO43–(aq)  +  HCl(aq);           (D) HPO42–(aq)  +  H3O+(aq)  -->  H2PO4–(aq)  +  H2O(aq);

A phosphate buffer contains KH2PO4 and K2HPO4. What is the net ionic equation for the buffering reaction that occurs when some HCl is added to the buffer solution?           (A) H2PO4–(aq)  +  Cl–(aq)  -->  HPO42–(aq)  +  HCl(aq);           (B) H2PO4–(aq)  +  H3O+(aq)  -->  H3PO4(aq)  +  H2O(aq);           (C) HPO42–(aq)  +  Cl–(aq)  -->  PO43–(aq)  +  HCl(aq);           (D) HPO42–(aq)  +  H3O+(aq)  -->  H2PO4–(aq)  +  H2O(aq);

Chemistry
Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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A phosphate buffer contains KH2PO4 and K2HPO4. What is the net ionic equation for the buffering reaction that occurs when some HCl is added to the buffer solution? 

         (A) H2PO4–(aq)  +  Cl–(aq)  -->  HPO42–(aq)  +  HCl(aq);

          (B) H2PO4–(aq)  +  H3O+(aq)  -->  H3PO4(aq)  +  H2O(aq);

          (C) HPO42–(aq)  +  Cl–(aq)  -->  PO43–(aq)  +  HCl(aq);

          (D) HPO42–(aq)  +  H3O+(aq)  -->  H2PO4–(aq)  +  H2O(aq);

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Buffer solution :- 

    Buffer solution are those solutions which resist a change in pH upon addition of small amount of acid or base. 

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