Tampilkan postingan dengan label salt and base. Tampilkan semua postingan
Tampilkan postingan dengan label salt and base. Tampilkan semua postingan
5. A solution contains 0.2M NH4OH and 0.2M NH4CI. If 1.0 mL of 0.001 M HCl is added to it. What will be the [OH-] of the resulting solution [Kb = 2x10-5] ?
5. A solution contains 0.2M NH4OH and 0.2M NH4CI. If 1.0 mL of 0.001 M HCl is added to it. What will be the [OH-] of the resulting solution [Kb = 2x10-5] ?
A. 2x10-5
B. 2x10-3
C. 5x10-10
D. None of these
SOLUTION
Concentration of NH4OH = 0.2M
Concentration of NH4Cl = 0.2M
Concentration of HC1 = 0.001 M
[Kb = 2x10-5]
Applying Henderson Equation
POH = PKa + log [salt/base]
POH = 5 - log 2 + log(0.2/0.2)
POH = 5 - log2
[OH-] =2x10-5
So, the [OH-] of the resulting solution is 2x10-5 (the option (A) is the correct answer).
Langganan:
Postingan
(
Atom
)
