Illustrated Guide to Home Chemistry Experiments

370 DIY Science: Illustrated Guide to Home Chemistry Experiments

TABLE 20-3: Quantitative anion analysis of seawater—observed and calculated data

Item value

A. Mass of empty 100 mL volumetric flask __________. ____ g

B. Mass of flask + 100.00 mL seawater __________. ____ g

C. Mass of 100.00 mL seawater (B – A) __________. ____ g

D. Density of seawater (C/100)

__. ____

g/mL

E. Mass of 150 mL beaker __________. ____ g

F. Mass of 150 mL beaker plus residue after evaporation __________. ____ g

G. Mass of total dissolved solids __________. ____ g

H. Mass percentage of dissolved solids ([G/C] · 100) __________. ____ %

I. Volume of seawater aliquot for chloride analysis ______._____ mL

J. Initial volume of silver nitrate titrant ______._____ mL

K. Final volume of silver nitrate titrant ______._____ mL

L. Volume of silver nitrate titrant used ______._____ mL

M. Moles of silver ion required to reach endpoint ___.________ mol

n. Mass of chloride ions in 5.00 mL sample __________. ____ g

O. Mass of chloride ions per liter of seawater _____.______ g/L

P. Volume of seawater aliquot for sulfate analysis ______._____ mL

Q. Mass of filter paper __________. ____ g

R. Mass of dry filter paper and filtrand __________. ____ g

S. Mass of barium sulfate (R – Q) __________. ____ g

T. Mass of sulfate ions present in the aliquot __________. ____ g

U. Mass of sulfate ions per liter of seawater _____.______ g/L