Question:

A sample of an unknown sulfate compound has a mass of 0.100 g. Addition of excess barium chloride solution to the sample forms a

A sample of an unknown sulfate compound has a mass of
0.100 g. Addition of excess barium chloride solution to the
sample forms a barium sulfate precipitate of mass 0.0676
g. What is the mass % of sulfate ion in the unknown
sample?

A sample of an unknown sulfate compound has a mass of 0.100 g. Addition of excess barium chloride solution to the sample forms a barium sulfate precipitate of mass 0.0676 g. What is the mass % of sulfate ion in the unknown sample?

Answer

0.0676 g
XSoda + Bally Basoa
Olg
All of sulphate from X2 (50)a goes
to basoa
weight of so q in Basoa formed
0.027827
Z
0.0676
x 96.06
233.38
mass percent of soe in X2 (50q) a
0.02782 x loo
x
2
27,82%
oil
Ans= 27,82%

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