Parameter

Value

Mass of unknown sample (g)

0.3623 g

Mass of the crucible and lid (g)

37.3306 g

Mass of the crucible, lid, and precipitate (g)

38.1096 g

Mass of precipitate (g)

0.779 g

Number of moles of precipitate (mol)

3.34 X 10 -3 mol

Number of moles of SO42- in precipitate (mol)

3.34 X 10 -3 mol

Mass of SO42- in precipitate (g)

0.321 g

Percent SO42- (%)

88.6%

Formula

Formula Weight (g/mol)

SO42- Content (%)

Solubility in Water

Li2SO4

109.95 g/mol

87.376 %

Yes

Na2SO4

142.05 g/mol

67.631 %

Yes

Na2SO4 · H2O

160.07 g/mol

60.017 %

Yes

K2SO4

174.27 g/mol

55.127 %

Yes

CaSO4

136.15 g/mol

70.562 %

Slightly

MgSO4

120.38 g/mol

79.806 %

Yes

SrSO4

183.69 g/mol

52.300 %

Slightly