Hi, Rachel, 

Thank you for the comments that you found my class helpful!

And I'm sorry for a-bit-late reply, however, I usually dont answer for the school work on the masterprep. 

I hope you understand my condition. 

By the way, the picture you uploaded looks good, organized and clear. (although I didnt check the mathematical calcuations ***)

However, the percentage yield normally dont go higher thatn 100%, so there must be some critical error sources (like not a complete drying etc). - i wrote a complete trying** that was typo :( 

And for the text you typed here above, 

the name of the compound and formula dont match with each other, so i'm little worried about that you might have calculated theoretical yield from the wrong mass, probably?

One more thing to mention is 

mass of precipitate formed + mass of fileter paper = 2.76 g, not just mass of the precipitate formed. 

Since you subtract the mass of filter paper from the mass above, it should be clearly indicated as the mass of precipitate plus filter paper. 

I had an understanding about it due to the context from the picture. 

That's it just for this time. 

I hope you can ask more questions about my lectures. 

I will see you in next questions!! 

Thank you

Best, 

Kelda Park