Complete the following table and show the calculations for the determinations fo
ID: 952569 • Letter: C
Question
Complete the following table and show the calculations for the determinations for Trial I (see Report sheet) Record all calculated data to the correct number of significant figures. Mass of dry, solid acid (g) Molar concentration of NaOH(mol/L) Buret reading of NaOH, initial (mL) Buret reading of NaOH at stoichiometric point, final (mL) Volume of NaOH dispensed at stotchicmclnc point (ml from graph) Moles of NaOH to the stoichiometric point (mol) show calculations Moles of acid (mol) show calculations Molar mass of acid (g/mol) show calculations Volume of NaOH halfway to the stotchiometnc point)mL from graph) pK. of weak acid (from graph) For Tnals 2 and 3. The molar mass of the weak acid was determined lo he 123 g/mol and 121 g/mol respectively. What is the average molar mass of the weak acid? What are the standard deviation and the relative standard deviation (%RSD) for the molar mass data of the weak acid?Explanation / Answer
a) Average molar mass = (123+121)/2 =122 g/mol
b) (SD)2= {(123-122)2 +(121-122)2}/(2-1)=2
SD=1.414
c) Relative standard deviation =100*SD/ Mean or average= 100*1.414/122=1.15%