<u>Answer:</u> The pH of the solution is 11.24
<u>Explanation:</u>
We are given:
Molarity of ammonia = 0.2 M
The given chemical equation follows:
I: 0.2
C: -x +x +x
E: 0.2-x x x
The expression for equilibrium constant follows:
![K_b=\frac{[NH_4^+][OH^-]}{[NH_3]}](https://tex.z-dn.net/?f=K_b%3D%5Cfrac%7B%5BNH_4%5E%2B%5D%5BOH%5E-%5D%7D%7B%5BNH_3%5D%7D)
Putting values in above expression, we get:
Neglecting the negative value of x as concentration cannot be negative.
So, ![[OH^-]=x=1.88\times 10^{-3}M](https://tex.z-dn.net/?f=%5BOH%5E-%5D%3Dx%3D1.88%5Ctimes%2010%5E%7B-3%7DM)
pOH is defined as the negative logarithm of hydroxide ion concentration present in the solution.
![pOH=-\log [OH^-]](https://tex.z-dn.net/?f=pOH%3D-%5Clog%20%5BOH%5E-%5D)
Putting values in above equation, we get:
We know:
Hence, the pH of the solution is 11.24
Answer is: B. designing an experiment to test the plum pudding model.
Rutherford demonstrate that J.J Thompson's Plum Pudding model was not accurate, but before testing, he thought that plum pudding model is correct.
Rutherford theorized that atoms have their charge concentrated in a very small nucleus.
This was famous Rutherford's Gold Foil Experiment: he bombarded thin foil of gold with positive alpha particles (helium atom particles, consist of two protons and two neutrons).
Rutherford observed the deflection of alpha particles on the photographic film and notice that most of alpha particles passed straight through foil.
That is different from Plum Pudding model, because it shows that most of the atom is empty space.
Sodium Chloride or NaCl is a ionic bond
