Balance the following equation: H_3 O^+ _(aq) + Ca(NO_3)2(s) + (NH_4)_2 HPO_4(s)

Question

Balance the following equation: H_3 O^+ _(aq) + Ca(NO_3)2(s) + (NH_4)_2 HPO_4(s) + NH_3(aq) rightarrow Ca_10(PO_4)_6 (OH)_2(s) + NH_4 NO_3(aq) You should use NO MORE THAN 100 mL 0.25 M NH_4 OH, 4 g Ca(NO_3)_2 middot 4H_2 O, and/or 3 g (NH_4)_2 HPO_4. NOTE: This is not a stoichiometric recipe. Part of the grading for this lab will be based on your ability to determine appropriate quantities of each reactant. Clearly show the actual amount of each reactant you intend to use. Determine the mass or volume of each reactant in the proper stoichiometric ratio, to synthesize and analyze a sample of calcium hydroxyapatite. Predict the solubility of hydroxyapatite in a concentration solution of HCl, a dilute solution of HCl, and a dilute solution of citric acid.

Explanation / Answer

Answer:

1.balance the reaction

16 H3O+ + 110 Ca(NO3)2 + 66 (NH4)2HPO4 + 84 NH3 -------> 11 Ca10(PO4)6(OH)2 + 218 NH4NO3

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