The question is incomplete, here is a complete question.
A solution is prepared at 25 °C that is initially 0.18 M in methylamine (CH₃NH₂), a weak base with , and 0.35 M in methylammonium bromide (CH₃NH₃Br). Calculate the pH of the solution. Round your answer to 2 decimal places.
Answer : The pH of the solution is, 10.36
Explanation :
First we have to calculate the value of .
Now we have to calculate the value of pOH.
Using Henderson Hesselbach equation :
Now put all the given values in this equation, we get :
Now we have to calculate the pH.
Therefore, the pH of the solution is, 10.36