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3A. Given the unbalanced reaction: 2 H₂PO4 (aq) + Ba(OH)₂ (aq)-Bay(PO4)2 (77)+H₂O (1) AH, -777 1) Insert the whole number coefficient into each blank to balance the equation properly. I) Indicate the phase expected for Bag(PO4)2: (s). (1), (g) or (aq)? ) Give the proper name for Ill-a) H₂PO4 (aq) Ill-b) Ba(OH)₂ (aq). tv) When 50.0 mL of 0.350 M H3PO4 (aq) (density 1.13 g/mL) and 25.0 mL of 0.500M Ba(OH); (aq) (density = 1.25 g/mL) are combined in a coffee cup calorimeter, the temperature of the mixture decreases from 25.38°C to 21.72°C. Based on these data, Iv-a) what is AHxn, in kj per mol of Ba,(PO4)2 formed? (Assume that the specific heat of the solution is that of water.) Iv-b) What is the molarity (M) of the H₂PO4(aq) present after the reaction is complete, if any is left? 38. Which of the following metals, if any, would not react with 0.150M CoCl₂ (aq) to form Co(s)? (may be 1 or more than 1 correct answer) a) K b) Ag c) Fe d) Cu