I think I have most of it correct just need help ensuring I understood everythin
ID: 1053404 • Letter: I
Question
I think I have most of it correct just need help ensuring I understood everything and got it right. Also need help with final observation of What happened as excess AgNO3 solution was added to the XCL solution? As AgNO3 was added to the XCL solution the Chlorine bonded to the Silver leaving XNO3 as a byproduct.-----I think there is more too it, do you think this will suffice?
Answer: Initial unknown chloride sample weight (g): 5?
Weight of AgCl precipitate: 12.262g
Approximate volume of AgNO3 solution added (ml):85ml
Moles of AgCl = ( AgCl precipitate mass/143.32 ): 12.262/143.32= 0.085mole
Weight of Cl- in XCl sample = (moles of AgCl)x(atomic weight of Cl- = 35.4527) : 1.237gCl-
% Cl- in sample = (weight of Cl- in XCl sample / weight of XCl sample) x 100 % : 24.74%
What happened as excess AgNO3 solution was added to the XCl solution ???
Step 1: Obtain unknown, in a 250 ml Beaker add 5 g of unknown chloride XCl. Step 2: Add water to XCl, fill beaker to 100ml level by adding water, stir solution until XCl is completely dissolved. Step 3: Add Concentrated Nitric Acid, add 1 ml of concentrated acid to XCl solution. Step 4: Add 1M AgNO3: Obtain a 100ml graduated cylinder and fill with 1M AgNO3, add AgNO3 to XCl solution in 5 to 25 ml increments. A precipitate of AgCl will form and gradually settle. Continue to add AgNO3 until no more precipitate forms. To verify that the reaction is complete check the chemical properties of the beaker (by double-clicking on it) and confirm that all of the XCl (in solution) has been consumed. Step 5: Filter and weigh AgCl : Obtain a 250ml Erlenmeyer flask and add a filter, pour the contents of the beaker into the flask. Remove the filter from the Erlenmeyer flask (by again selecting the filter menu or button) and save the solid contents in a watch glass. Weigh the sample and record the result. * *Note that in an actual lab the AgCl filtered precipitate would need to be dried to remove excess water, however in this simulation the filtered precipitate is free of water.
Explanation / Answer
a) yes. You have solved the problem in pefect manner.
b) if you add excess of AgNO3 it will not effect anything on the reaction. Because the excess AgNO3 do not participate in the reaction and will be soluble in water. So it will be washed out through washing with water while filtration, the precipitate (AgCl) wont effect much.