Question

16H lap to Mn On Cop) +56 Oy can 10.60249) + 2 + 2H₂ ble Oxidation-Reduction Titrations : Determination of Oxalate 5. What volume of 0.100 M KMnO, would be required to titrate 0.23 g of K[Cu(C204)21 2H,0? Moles Mon moles CO 2 Vxma 5.2%10 ind - 0.100 Mill (0.29 Cocos 1:21 359.93 Malacca)70 5.20 L = 5.2mL Wiel V . Men 6. Calculate the percent C,0,?" in each of the following: H.C,0..Na.co.KC,0, and K[Al(COD) 34,0 7. If 28.70 mL of 0.0200 M KMnO is required to titrate a 0.250 g sample of K [Fe(C,0)31-3H,O, what is the percent C,0 in the complex? 8. What is the percent purity of the complex in question 72

Answer 1

1. Given data Mass 20.239. CKMNO4) = 0.100M let us consides a reaction, 2mney +592042 + 16ht -> 2M62 +10 602 +8450 Moles nes Ob RzCcucc2042,2x2H20 - Mass mola mass 0.239 353.81 gimo) = 6.50 Y10 moi Moler ob 2017 - 24 moler of K2 [Cu(904727240 =240.000650 = 0.001300 mo) Mole of maat = 2 x moles of Garn - X 0.001300 -0.00052 mo) Nolume of Emney = M concentration of mnou 0.00052 moi 0.100 m 30100522 [volume = 512mL)

о (e The percent of Go2- - Molas mass of cay xoo moles mass of H26204 X 100 88.019 x100 90.035 = 97.76 7. Percent of Goy? - molas mass of CzOy 2- 7100 molas mass of Yzcz04 881019 gimo) vino 1661216 = 52.95% Per cont oly G204- = 3x molas mass of Czay 81007 moler mass of Kzfal (620422)370 34 881019 x 100 462138 357110^).