Experimental Data Enter the data shown in the video for Unknown Sulfate #23 below or where required, calculate the value from your data:

Mass of empty 250-mL beaker (from video) =129.536g
Mass of 250-mL beaker and unknown sulfate (from video) =129.840g
Mass of unknown sulfate (calculated) =0.304g
Mass of empty crucible (from video) =10.320g
Mass of crucible and barium sulfate (from video) =10.723g
Mass of barium sulfate =0.403g

Calculations and Conclusions

Calculate the mass of sulfate in the unknown sample:

Mass of sulfate in unknown =g

Calculate the percentage by mass of sulfate in the unknown sample:

Mass percent of sulfate in unknown =
%
The cation in the unknown sulfate is one of the following:

Al3+ Na+ Ni2+ K+ NH4+ Cd2+

For each of these six cations, write the formula of its sulfate, and calculate the percentage mass of sulfate in the compound.

Formula of aluminum sulfate =

Mass percent of sulfate in aluminum sulfate =
%
Formula of sodium sulfate =

Mass percent of sulfate in sodium sulfate =
%
Formula of nickel(II) sulfate =

Mass percent of sulfate in nickel(II) sulfate =
%
Formula of potassium sulfate =

Mass percent of sulfate in potassium sulfate =
%
Formula of ammonium sulfate =

Mass percent of sulfate in ammonium sulfate =
%
Formula of cadmium sulfate =

Mass percentage of sulfate in cadmium sulfate =