1. (3 pts) Will formula unit of the p a mixture of caleiumbromide and lithiumsul
ID: 543912 • Letter: 1
Question
1. (3 pts) Will formula unit of the p a mixture of caleiumbromide and lithiumsulfate result in a precipitate? If so, give the 2. (8 pts) rite balanced total lonie equations for the following mixtures. If no reaction happens, write NR ammonium phosphate 3 CU'No- topper (1),nitrate s ) A9) 0.200 M sodium sulfate with 40.0 mL 0.150 M barium nitrat (a) How many moles of precipitate will be formed (if any)? Gaso (b) What is the concentration of barium ions after you mix the solution and wait for the reaction (if any) to finish. 0.0333MExplanation / Answer
Q3
b)
excess of Ba+2 after reaction:
mmol of Ba(NO3)2 = MV = 40*0.150 = 6
mmol of Na2SO4 = MV = (20*0.20) = 4
after precipitation of
Ba+2 + SO4-2 = BaSO4
mmol of Ba+2 left = 6-4 = 2 mmol
Vtotal = 40+20 = 60 mL
[Ba+2] = mmol/V = 2/60
[Ba+2] = 0.033 M left
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