11. Solution to Chemistry Problem

2. When analyzing a mixture of HCl and H3PO4, a 10.00 mL sample was diluted to 200.0 mL. To titrate 15.00 mL of this solution with methyl orange, 13.90 mL of a 0.1015 M NaOH solution was used. To titrate the same volume of the solution with phenolphthalein, 26.20 mL of the NaOH solution was used. What mass of HCl and H3PO4 is contained in 50.00 mL of the mixture? Answer 0.3952 g HCl 8.16 g H3PO4