Question

Determination of Concentration of Unknown Prepared From Solid NiSO, 6H20: D. Molar mass of NISO4+6H2O 1. Calculations: 130 0.00325 0.954 d.455 Molarity to be prepared (per Unknown ID) 2. Grams solid NISO4-6H2O calculated 3. Grams solid NISO4 6H2O actually used 4. Calculations: O.120= C.03500L.O0325nu) 22.65j = 0.8519 .@02 Absorbance of solution 5. M Concentration of Unknown from calibration curve 6. Calculations: Analyze the concentrations results from D.2 and D.5. Do they differ Significantly or are they relatively the same? Which one do you think is more precise and why? 6 AutoSave Book1 Excel Chart Tools File Home Insert Page Layout Formulas Data Review View Help Design OSearch Format Add Chart Quick Element Layout Change Colors Switch Row/ Sel Column Di Chart Layouts Chart Styles Data Chart 1 D C E F G H C 1 Abundanc Concentration 2 C 0.04 0.188 0.08 0.38 0.12 0.566 Chart Title 0.16 0.744 0.2 0.93 1 b.9 y-4.6457x 0.0034 b.8 b.7 D6 b.5 0.4 0.3 D 2 D.1 0,04 0.12 0.16 0.2 0.24 0,08 Concentration (M) auequosqy C. Determination of Concentration of Liquid Unknown: Unknown ID 8-C 552 Absorbance Determine the concentration of the diluted unknown species using the calibration 1. curve. Diluted concentration: y=mx+b Calculations: 2. Determine the concentration of the original unknown species before dilution Original concentration: 25.

Answer 1

Absorbane O402 Comueahrahen2 4 .6437 X 0.0039 Y Absex bana Canentiahen O.402 4.64S7.X +60o3y freom Dasoxbana clato ts mons Prucise The n caldated because idata may vay clering fruparchen o salhen du hs Aeman error Absoxbona O.552 O.552=. 4.64.57 x+O 0039 V2 25mi V,2 3mL M2 :0.014