if 100 mL of 0030 M HCl solution is added to 100 mL of buffe

if 100. mL of 0.030 M HCl solution is added to 100. mL of buffer solution which is 0.10 M in NH3 and 0.1 M in Nh4Cl, what will be the pH of the new solution?

When 100 ml of 0.03M HCL is added , NH3 reacts with HCL to form NH4Cl .

amount of NH3 reacted = 0.03*100= 3 millimoles

Initially the soln contained 0.1*100=10 millimoles of NH3 and 10 millimoles of NH4Cl

now the soln contains 13 millimoles of NH4Cl and 7 millimoles of NH3

So according to nernest equation

pH = pKa+ log [NH3/[]NH4Cl]

=9.24 + log 7/13

=9.24-.27

=8.97

if 100. mL of 0.030 M HCl solution is added to 100. mL of buffer solution which is 0.10 M in NH3 and 0.1 M in Nh4Cl, what will be the pH of the new solution?Sol

if 100 mL of 0030 M HCl solution is added to 100 mL of buffe

Solution

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