Explain the two assumptions involved in the Ka weak acid dissociation equation.
On the numerator of the Ka equation, the concentration of protons is written as being squared due to the fact the concentration of protons is equal to the concentration of the conjugate base in solution.On the denominator, the concentration of the acid is written as the initial concentration of the acid. This is because a weak acid negligibly dissociates hence the concentration will remain roughly constant.
LL
Related Chemistry A Level answers
All answers ▸Acid HA has a Ka of 2.00 x 10-4mol dm-3. A solution was made by adding 15cm3 of 0.34 M NaOH to 25cm3 of 0.45M HA. Calculate the moles and the concentration of A- and HA in this solution. Using the expression for Ka calculate the pH of the solution
At what temperature would 0.05 moles of nitrogen gas occupy 1000cm^3 at 50kPa?
I am struggling to with unseen organic chemistry mechanism. I don’t know where to begin drawing them.
What chemical test can be used to differentiate between alkenes and alkanes. Describe and explain the results.