6. Professor Molaritie conducted a titration in which he measured out 42.5ml of 0.275MBa(OH)2 and titrated it with 25.7mL of H3PO4. Determine the concentration (M) of the H3PO4. (6 merks) (Hint: This is similar to o puestion we did in closs - so check the slides 1) (4 marks). 7. Use this balanced equation to answer the following questions. Please clearly show all your calculations. What is the molarity of the Ca(NO3)2 solution when 43.0mL reacts with 55.2mL of 2.5M Na3PO4 ? (6 marks) Hint: This is a stoichiometry question, so you'll need to use mole ratios 4 Molarity (M)= moles Aitre and moles =g/MM There are same exomples of similar Molarity questions in Chopter 14 of your textbook pp. 3t8 and in the slides 3Ca(NO3)2(a0)+2Na3PO4(04)Ca3(PO4)2(s)+6NaNO3(a)