Calculate the ratio of ch3nh2 to ch3nh3cl required to create a buffer with ph = 10.24.

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:

pH = pka + log₁₀ [A⁻] / [HA]

10.24 = 10.62 + log₁₀ [A⁻] / [HA]

-0.38 = log₁₀ [A⁻] / [HA]

0.4167 = [A⁻] / [HA]

0.4167 = CH₃NH₂ / CH₃NH₃Cl

I hope it helps!

sry but any answer choices

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

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(jacemorris04)