Question

DATA TO BE USED Please use the data provided below to complete this assignment. Refer to Expt. 7 in the laboratory manual for an explanation of the data. o Mass used to prepare 5.0 g/L sodium sulfate solution: 0.494 g o Mass used to prepare 0.025 M sodium sulfate solution: 0.351 g o Mass used to prepare 2.0 mM sodium sulfate solution: 0.025 g o Conductivity (in uS/cm) for 5.0 g/L and 0.025 M and 2.0 mM sodium sulfate solutions were 7728, 5545, and 432 respectively.

Answer 1

10oom # ADDITIONAL PROBLEM for preparing 250m2 of 3.0M RF. @ 1000 mL require - 3 mole of Rf .: 250 mL will require = 3 x 250 m2 mole of RF = 0.75 mole RFI ♡ grams of KF = 0.75 mole x 589 (molar mass) = 43,5 a For preparing Potassium sulfate (K2504) 25 m2 of 0.03750 m K₂SO4 b.: 1000 ml solution ontain = 0.0375 mole. 25 mi " 1 0 .0375 mole x 25 ml 1000 me 1 = 9.375x104mole) 2 1 mole Rasou = 2ktions .: 9.3758104 K₂SO4 = 2x9.375 x 104 ktions = 18.75x109 stions 6 for Preparing Cacla solution. @ 1000 mL of solution require = 0.02 X 110.98 g moja 100 1 0.02 mol X110.98 g moj'x100mL mole mol 1000ML =0.221968! © If W=0.2289 in concentration = a/m = 0.2288/10,98 g moi 22 E 0.002 M

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