Some latest academics question and answer inquired students to mention what they believe is the most important important challenge for a student to do in order to score success. Of the many comments, the one that that stood out was practice. Successful persons ordinarily are not born successful; they become successful with hard work and persistence. If you wish to obtain your goals, keep this in mind! right below some question and answer examples that you could definitely make use of to boost your knowledge and gain insight that will assist you to sustain your school studies.
Question:
Calculate the ratio of ch3nh2 to ch3nh3cl required to create a buffer with ph = 10.24.
Answer:
Answer:
0.4167 = CH₃NH₂ / CH₃NH₃Cl
Explanation:
The CH₃NH₂ / CH₃NH₃Cl buffer has a pka of 10.62. Using Henderson-Hasselbalch formula:
pH = pka + log₁₀ [A⁻] / [HA]
Where A⁻ is weak base, CH₃NH₂, and HA is conjugate acid, CH₃NH₃Cl. It is possible to obtain the ratio of CH₃NH₂ / CH₃NH₃Cl to create a buffer with pH = 10.24, thus:
10.24 = 10.62 + log₁₀ [A⁻] / [HA]
-0.38 = log₁₀ [A⁻] / [HA]
0.4167 = [A⁻] / [HA]
0.4167 = CH₃NH₂ / CH₃NH₃Cl
I hope it helps!
They could actually hopefully assist the student resolve the question by make use of the questions and answer examples. Then would possibly carry out some sharing in a group discussion and also study with the classmate with reference to the topic, so another student also ought to have some enlightenment and still keeps up the school learning.