Question

Experiment A

Mass of evaporating dish and watch glass (g): 51.368

Mass of evaporating dish + watch glass + Na2CO3: 51.677

Mass of Na2CO3 Used: 0.309

Mass of evaporating dish + watch glass + NaCl: 51.671

Mass of NaCl collected: 0.303

a) The number of moles of sodium carbonate (M.W. = 105.989 g/mole). Only enter the numerical value with the right number of sig. figs. and in exponential form (e. g. 1.23E-1).

b) The number of moles of sodium chloride (M.W. = 58.44 g/mole). Only enter the numerical value with the right number of sig. figs. Divide both of your results from the preceding two steps by the lower mole value to determine the simplest mole-to-mole ratio between sodium carbonate and sodium chloride.

c) Simplest mole ratio before rounding (correct number of sig. figs.)

d) Simplest mole ratio after rounding (whole number, no decimals)

e)

Actual Yield of NaCl:

Theoretical Yield of NaCl:

Percent Yield of NaCl:

Answer 1

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