Typical bloos serum NaCl concentration is 0.154M, which meansthat the concentrat

Question

Typical bloos serum NaCl concentration is 0.154M, which meansthat the concentration of sodium is also 0.154M. a) What is the concentration of sodium ion in mEq/L? b) How would you prepare 1.00L of an isotonic NaCl solutionfrom solid NaCl? c) You need 1000mL of 0.154M NaCl, but the only solutionavailable is 1.50M NaCl. How much of this stock soluiton will youmeasure out to make your solution? (C1V1=C2V2) d) How much water will you add to get a total volume of1000mL? Typical bloos serum NaCl concentration is 0.154M, which meansthat the concentration of sodium is also 0.154M. a) What is the concentration of sodium ion in mEq/L? b) How would you prepare 1.00L of an isotonic NaCl solutionfrom solid NaCl? c) You need 1000mL of 0.154M NaCl, but the only solutionavailable is 1.50M NaCl. How much of this stock soluiton will youmeasure out to make your solution? (C1V1=C2V2) d) How much water will you add to get a total volume of1000mL?

Explanation / Answer

a0 Normality= No. of equivalents/ Vol. in litre                =No.of milli equivalents/Vol.in mL       b) given molarity = 0.154M                 Mol. wt.of NaCl=23+35.5                                           =58.5                       0.154 =(wt./58.5) * (1000/1000)                      wt. =9.009 grams i.e., 9.009 grams of solid NaCl is weighed in a 1000mLvolumetric flask . c)  CV =C"V" 1000*0.154 =1.50 *V''    V' =102.67 mL i.e., 102.67 mL of 1.50M NaCl solution is taken ina 1000mL volumetric flask. d)In the case (c) vol. of NaCl taken =102.67 mL Vol. of water added to get 1000 mL solution = 1000-102.67                                                                       =897.33mL

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