Problem: The pH of normal urine is 6.30, and the total phosphate concentration ([PO43−] + [HPO42−] + [H2PO4−] + [H3PO4]) is 0.020 M. What is the minimum concentration of Ca2+ necessary to induce kidney stone formation? (See Exercise 15.49 for additional information.)

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The pH of normal urine is 6.30, and the total phosphate concentration ([PO43−] + [HPO42−] + [H2PO4] + [H3PO4]) is 0.020 M. What is the minimum concentration of Ca2+ necessary to induce kidney stone formation? (See Exercise 15.49 for additional information.)

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