Assignment:
a) What is the expression for the eqilibrium constant K in terms of the concentrations of the products and reactants for the reaction between ammonia, (NH3 (aq)) (SMALL 3), WHICH REACTS WITH WATER TO PRODUCE AMMONIUM (NH4 + (aq))
and hydroxide (OH- (aq)) ions.
NH3 (aq) + H20 (l) = NH4+ (aq) + OH- (aq)
the enthalpy change is +3.5kj mol
Using the equilbrium expression (from above) calculate What the OH- (aq) ion concentration in an ammonia solution with an equilibrium concentration of 1.00 x 10-2 mol dm-3 (ie 10 to the power -2) the concentration of water at 25 degrees celcius is 55.4 mol dm-3 and the value of the equilibrium constant K for the reaction is 3.19 x 10-7 (ie 10 to the power -7). the answer needs to be to 3 significant figures.
b) Use the calculated value for OH- (aq) ion concentration together with the expression for the ion product of water to calculate the H+ (aq) ion concentration. Calculate the PH for the ammonia solution. Assume that Kw = 1.00 x 10-14 mol2 dm-6 (ie 10 to the power -14) at 25 degrees celcius, the answer needs to be to 3 significant figures.
Provide complete and step by step solution for the question and show calculations and use formulas.