1). Areaction with 5.00 grams of NH3 and excess O2 and is allowed to react, howe
ID: 915056 • Letter: 1
Question
1). Areaction with 5.00 grams of NH3 and excess O2 and is allowed to react, however, not all of the NH3 is used up. The actual yield of the NO product produced only 4.50g. Given the molar mass of NH3 is 17.03 g/mol and the molar mass of NO is 30.01 g/mol, answer the following questions. Show all steps with units.
a) Find the percent yield of this reaction.
b) Find the mass (in grams) of NH3 that is left over.
[I found my % yield to be 12.8% but I'm not sure if it is correct].
2) Given 3CuCl2(aq) + 2K3PO4(aq) --> Cu3(PO4)2 (s) + 6KCl (aq), what is the balanced net ionic equation, including phases, for this reaction? (This is a double replacement reaction). Show all work.
Explanation / Answer
4NH3+ 5O2 <-------> 4NO + 6H2O
from equation
4 mol NH3 = 4 MOL No
nO OF Mol of NH3 = 5/17 = 0.294 mol
so that,
nO OF mol of NO produced = 0.294 mol
Theoretical yield = 0.294 *30 = 8.82 grams
actual yield = 4.5 grams
a) percent yield of this reaction. = actual yield/
Theoretical yield *100
= 4.5/8.82*100 = 51%
2)
net ionic equation :
3Cu^2+ (aq) +2PO4^3- (aq) ---> Cu3(PO4)2 (s)
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