is true regarding the reaction?
When the reaction is complete, the concentrations of both magnesium and
phosphate are essentially 0.
(A)
(B) Magnesium nitrate is the limiting reactant.
(C) Sodium phosphate is the limiting reactant.
Since nitrate ion is a spectator ion, the concentration of nitrate ion in the final
solution will be the same as in the original magnesium nitrate solution.
(D)
(E) Na 3 PO 4 and Mg(NO 3 ) 2 react in a 1:1 ratio.
58 . ....Na 3 PO 4 (aq) + ....Mg(NO 3 ) 2 (aq) →
....Mg 3 (PO 4 ) 2 (s) + ....NaNO 3 (aq)
Equal volumes of 0.10 M sodium phosphate and 0.10 M magnesium nitrate are mixed
according to the unbalanced reaction equation above. When the reaction is complete,
what is the concentration of sodium ions in the solution?
(A) ~0 M, because all the sodium ions will precipitate
(B) 0.05 M
(C) 0.10 M
(D) 0.15 M
(E) 0.30 M
59 . Determine the heat of reaction for the combustion of sulfur dioxide
2 SO 2 (g) + O 2 (g) → 2SO 3 (g)
given the following thermochemical equations:
I. S 8 (s) + 8 O 2 (g) → 8 SO 2 (g) ΔH = −2374.6 kJ
II. S 8 (s) + 12 O 2 (g) → 8 SO 3 (g) ΔH = −3165.8 kJ