Login

Welcome, Guest. Please login or register.

July 22, 2025, 09:09:40 am

Author Topic: Gravimetric Analysis Question  (Read 816 times)  Share 

0 Members and 1 Guest are viewing this topic.

luffy

  • Victorian
  • Forum Leader
  • ****
  • Posts: 520
  • Respect: +23
  • School Grad Year: 2011
Gravimetric Analysis Question
« on: March 14, 2011, 04:47:31 pm »
0
Hi, guys:
When I did the question below, my answer was different to the one given in the textbook. I just wanted to know whether or not I was completing it correctly.

A 0.500 g sample of sodium sulfate (Na2SO4) and a 0.500g sample of aluminium sulfate (Al2(SO4)3) were dissolved in a volume of water and excess barium chloride added to precipitate barium sulfate. What was the total mass of barium sulfate produced?

Thanks in advance.




huaxiadragon

  • Victorian
  • Trendsetter
  • **
  • Posts: 124
  • Life is like Tetris, You can't take it back
  • Respect: +31
Re: Gravimetric Analysis Question
« Reply #1 on: March 14, 2011, 06:17:04 pm »
0
since you only want the answer.
I'm too lazy so here's my answer

m(BaSO4)=1.8445g

I'll post the method if you want them, just ask
ATAR 2010: 98.15
Chemistry: 50

2011-2013 (UoM | Bachelor of Science | Electrical Systems Major)

2014-2015 (UoM | Master of Engineering | Electrical | First Class Honours)

2016-2017 (Graduate Electrical Engineer)

2017+ Senior Engineer (Electronic Maintenance)

My Personal Guide on How I studied to get a 50!
Huaxiadragon's Experience in getting a 50 in Chem (Guide to How I studied)

luffy

  • Victorian
  • Forum Leader
  • ****
  • Posts: 520
  • Respect: +23
  • School Grad Year: 2011
Re: Gravimetric Analysis Question
« Reply #2 on: March 14, 2011, 06:40:41 pm »
0
since you only want the answer.
I'm too lazy so here's my answer

m(BaSO4)=1.8445g

I'll post the method if you want them, just ask

Could you please show me how to do it too? I must have made an error somewhere.

Thanks.

nacho

  • The Thought Police
  • Victorian
  • ATAR Notes Superstar
  • ******
  • Posts: 2602
  • Respect: +418
Re: Gravimetric Analysis Question
« Reply #3 on: March 14, 2011, 07:17:49 pm »
0
I got 1.8445








n(Ba) which reacted with Soldium sulfate = 0.00353 mol
therfore m(Ba) = 0.00352 x  137.3 = 0.455836g

n(Ba) which reacted with Aluminium sulfate = 0.004384 mol
therefore m(Ba) = 0.004384 x 137. 3 = 0.60192 g
add them altogether to find the mass of BaSO4 and you get 1.8445

Edit: ceebs applying latex, also, how do i insert spaces in my latex equations?
Double edit: Btw, i used an overly-complicated long way to do this, you should just work out the total moles of then with that find the total mols of Barium, then find the mass of the precipitate. Sorry
« Last Edit: March 15, 2011, 09:17:10 pm by nacho »
OFFICIAL FORUM RULE #1:
TrueTears is my role model so find your own

2012: BCom/BSc @ Monash
[Majors: Finance, Actuarial Studies, Mathematical Statistics]
[Minors: Psychology/ Statistics]

"Baby, it's only micro when it's soft".
-Bill Gates

Upvote me

huaxiadragon

  • Victorian
  • Trendsetter
  • **
  • Posts: 124
  • Life is like Tetris, You can't take it back
  • Respect: +31
Re: Gravimetric Analysis Question
« Reply #4 on: March 15, 2011, 07:29:34 pm »
0
lol just google it.

But I think that's it. havent tested it yet though.

http://www.personal.ceu.hu/tex/spacebox.htm
ATAR 2010: 98.15
Chemistry: 50

2011-2013 (UoM | Bachelor of Science | Electrical Systems Major)

2014-2015 (UoM | Master of Engineering | Electrical | First Class Honours)

2016-2017 (Graduate Electrical Engineer)

2017+ Senior Engineer (Electronic Maintenance)

My Personal Guide on How I studied to get a 50!
Huaxiadragon's Experience in getting a 50 in Chem (Guide to How I studied)