Question

Instructor Name: Student Name: DATA (EXP #2 ): Sink wek In keng Origin of your water sample: Part 1: Total Dissolved Solids Water sample size (mL): 5mL Mass after further heating Mass initial 43-3269 A3 3459 Mass empty evaporating dish (g) 43-3369 43-34 Mass of dish +water residue (g) Mass Difference (g) 0:0lg Part 2: Hardness Titration Molarity of EDTA (from carboy): Trial 2 Trial 3 Trial 1 0.00 me Initial Volume (mL) 000mL 7ML 그오at 8.1mc Final Volume (mL) Volume Difference (mL) 8.ome Part 3: Electrical Conductivity Water Sample RO Water DI Water 2-6 lcm 274.2 IS7.0 u Conductivity (uS/cm) Cm Instructor Name: Student Name: CALCULATIONS: Part 1: Total Dissolved Solids: Show work for total dissolved solids calculation (mg/L) Part 2: Hardness Show work for hardness calculation (mg/L): Trial 1: Trial 2: Trial 3: Average Hardness: 13 CHE-1261 Experiment 2

Answer 1

1. Total dissolved Solids' 25 mt water Aample enther Buating salid iulcol cyjten man 9xto 3 qAalid i ditcolued holid duisolveel (M glL) 25 mL 9 o00 25 Hardnuw Traton ' Dtihould be qMn) (ut it be munthn molarity of FDTA Mx vulume of E0TA ned -hom all araje 8.1 8.0 t7.3 8.o mL kquivalinin Ca co quivalint NIVI M V 2MI Vi EDTA mmol 2x mmol o Caco mmol MAX 8 mmai o Caco3 2 4M mmo mele o Ca McatoXVsarple 4- Mn 4 M mal, Mcac X Caco oo gImn mo (4/25) Mx Mca mot 4 4 XouMx lo00 Mg (16000X Mx) (16000 xMn) pPm MIL Con Ca co wh I6000XMx) Ppm in So total avTge hardnes M melnty of FDTA Solhon

for sepanate Soln trial Mcaug mmo1 2S mL > mg Мx x8.) pom x loox luoo 25 X2 Caca MM put val d briel 3. Mux7.9 Сan"g Cacog