The balanced equation is
NH3 + HCl --------> NH4Cl
Number of moles of NH3 =mass/mol.wt. = 4.93 g/(17.03 g/mol) = 0.289489 mol
Number of moles of HCl =mass/mol.wt. = 4.93 g/(36.46 g/mol) = 0.135217 mol
According to balanced equation,
1 mole of HCl reacts with 1 mole of NH3
So, 0.135217 mol of HCl would react with 0.135217 mol of NH3
But the number of moles of NH3 present is more than required.
That is NH3 is the Excess reagent and HCl is the Limiting reagent.
According to balanced equation,
1 mole of HCl produces1 mole of NH4Cl
So, 0.135217 mol of HCl would produce 0.135217 mol of NH4Cl
Mass of NH4Cl = moles * mol.wt. = 0.135217mol * 53.49 g/mol = 7.23274 g
Mass of NH4Cl = 7.23 g
(c)
According to balanced equation,
1 mole of HCl reacts with 1 mole of NH3
So, 0.135217 mol of HCl would react with 0.135217 mol of NH3
But the number of moles of NH3 present is more than required.
That is NH3 is the Excess reagent
Number of moles of NH3 present in excess = 0.289489 – 0.135217 = 0.154272 mol
No other gases is present other than NH3 in the flask
Number of moles = 0.154272 mol
Volume = 1.50 L
Temperature = 25 °C = 25 + 273.15 = 298.15 K
We know that
PV = nRT
P = nRT/V = (0.154272 mol * 0.0821 L.atm.mol-1.K-1 * 298.15 K)/(1.50 L
P = 2.517533 atm
Pressure in the flask = 2.52 atm
Answer:
Limiting reagent = HCl
mass of NH4Cl = 7.23 g
Pressure in the flask = 2.52 atm
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