chem moles helpWatch
chloride and anhydrous magnesium chloride. The student dissolved 1.056 g of
the powder in water in a conical flask and added an excess of sulfuric acid.
A white precipitate formed and was filtered off, washed and dried.
The mass of this solid was 0.764 g.
Identify the white precipitate and calculate the percentage, by mass, of
magnesium chloride in the powder.
So we've got BaCl2, MgCl2 and H2SO4
If you've revised thru solubility rules, which of these would react to give white precipitate?
Lets imagine if theres A, B, C and lets say A and B reacted to give D. Whats remaining? C right? Question asks us to find percentage of C present...try to guess how...
Ok so we've got MgCl2 and BaCl2 reacting w/ sulfuric acid.. what do we get?
Be reminded of the fact that 1.056g in the question is the total mass of BaCl2 and MgCl2
I just did the question using my above logic and got 36.6 % but did some rounding so could be a tad off, could you please tell me if this is around the right answer?
won't let me rep cus i've repped you recently :/