Question

Chi Chemical Meas Kelly Bean - ring20-WEI > Activities and Due Dates > Chi Chemical Measurements ssignment Score: 0% 02 21 - HRN SEC Resources Give Up Hint Check Answer Question 8 of 10 > A solution is made by adding 25.7 mL of concentrated phosphoric acid (85.5 wt%, density 1.70 g/mL) to some water in a volumetric flask, and then adding water to the mark to make exactly 200 mL of solution. Calculate the concentration of this solution in molarity. H,PO,] =

Answer 1

85.5 Density of H₂PO 4 = 1.70 og seile : 26.7 me H3PO 4 - 25.7 x 1170= 43.69 g H3 Pog. wt y. of H₂ POq - 86.5% . In 25.7 ms H₂po a mass of H₂POg = 406 43 69 x 5.1 H₂PO4 moleer mass (97.994 g/mol Total volume = 200 mi. 37 35 g H3PO4 = 37031 = 0.38 mot 2. [1H3PO4) = 0.38x1000 = 1.908 m des soio orlan DIX Scanned with CamScanner