Question

Name (Print) Ball 1) Define orthophosphate". (4 pts) 2) To find the hardness of a natural water sample, one student strated a 2500 ml. portion of natural water and consumed 24.56 ml of 1.036 x 10 MEDTA to reach the end point. Find the hardness of this natural water in mg-Caco/L-H.0. (Hint: Cacos : EDTA = 1:1 in molar ratio and Caco, 100.1 g/mol) (6 pts be After the dilution by DI tohle. Find the

Answer

Answer 1

2 volume of natural water sample (W) - 25.oout volume of EDTA (2) = 24.56mL Concentration of EDTA (C) - 1.036x103 molar ratio 1:1 concentration of Caco & ₂ V₂ M = 1.036x10 3 x 24.56 - 25.00 - 1.018 X10-3 m i moles of caco, in IL of water = 11018 x 10²3 mol o molar mast = 100.1 g/mol - mass of Cacoa = 1:018 x 103 x100.1g . 101.9 X10139 = 101.ging - Hardnego = 101.9 mile ng caca/L-H2O

Comment if any problem