The following plot shows the pH curves for the titrations of various acids by 0.10 M NaOH (all of…
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Question “The following plot shows the pH curves for the titrations of various acids by 0.10 M NaOH (all of…”
29. a,b,c
The following plot shows the pH curves for the titrations of various acids by 0.10 M NaOH (all of the acids were 50.0-mL samples of 0.10 M concentration). 12.0 10.0 8.0 6.0 4.0 2.0 0 10 20 30 40 50 60 Vol 0.10 M NaOH added (mL) a. Which pH curve corresponds to the weakest acid? b. Which pH curve corresponds to the strongest acid? Which point on the pH curve would you examine to see if this acid is a strong acid or a weak acid (assuming you did not know the initial concentration of the acid)? c. Which pH curve corresponds to an acid with Ka 1 x 10-6?
The following plot shows the pH curves for the titrations of various acids by 0.10 M NaOH (all of the acids were 50.0-mL samples of 0.10 M concentration) 12.0 10.0 4.0 0 10 20 30 40 50 60 Vo 0.10 M NaOH added (mL) curve corresponds to the weakest acid? a. Which pH acid a acid b acid c acid d acid e acid f urve corresponds to the strongest acid? t on the pH curve would you examine to see if this acid is a strong acid or a weak acid (assuming you did not know the initial concentration of the acid)? c. W h pH curve corresponds to an acid with K 1 x 10 62
The following plot shows the pH curves for the titrations of various acids by 0.10 M NaOH (all of the acids were 50.0-mL samples of 0.10 M concentration). 12.0 10.0 8.0 6.0 4.0 2.0 、 0 10 20 30 40 50 60 Vol 0.10 M NaOH added (mL) a. Which pH curve corresponds to the weakest acid? b. Which pH curve corresponds to the strongest acid? Which point on the pH curve would you examine to see if this acid is a strong acid or a weak acid (assuming you did not know the initial concentration of the acid)? starting point halfway point equivalence point sponds to an acid with Ka 1 × 10-6?
Answer
Answer 1
a)
The pH value of the weakest acid is the highest.
A has the highest pH value, so it is the weakest.
b)
Acid is dissociated as –
H+ ->
K = [H+][A -]/[HA]
The higher the Ka value, the greater the H+ concentration.
f is an acid with the lowest pH and therefore the highest Ka value.
c)
So, acid f is the strongest acid.
d)
All acids have the same equivalence because in the
presence of strong acid like NaOH all will behave like acid and at
the equivalence point we will have equal no. of moles of acid and
base in the solution
So, moles of acid = moles of NaOH (As acids are
monoprotic)
M1V1 = M2V2 (moles =
molarity*volume)
Where M1 . M2 is the molarity of the acid,base and
V1, V2 are the volume of acid and base
So, V1 = M2V2/M1
If M2,V2 and M1 is same then V1 will also be the same for each
acid
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Answer 2
ur mom lmao 420 69 ha ha lol get good
Conclusion
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