concentration

Lemon juice normally has a pH of 2.If all the acid in the lemon juice is citric acid and there are no citrate salts present, then what will be the citric acid concentration [HCit] in the lemon juice?(Assume that only the first hydrogen of citric acid is important)

6 Answers

1
gagar.iitk ·

in the question the data is insufficient either u have to give me the initial conc of the acid or the dissociation cons of the acid

plz correct me if i am wrong

1
rahul wadhwani ·

conc. is zero as it has nearly fully dissciates thinking so but agreeing with gagar

3
msp ·

sry rahul and gagar sir i ve missed the ka value.it is 8.4*10-4

1
gagar.iitk ·

the initial concentration is 0.13 molar and the concentration at the time of equilibria is 0.12 molar

3
msp ·

sir please give me ur soln.
and also doesnt the conc of [HCit] isnt zero as stated by rahul

1
gagar.iitk ·

H+=10-2

→OH-=10-2

using eq for charges→H+=OH-+[Cit-]

[Cit-]=10-2now [HCit]at equilibria can be found with

the help of Ka values then initial concentration can be found with the help of mass eq
[HCit]0=[HCit]+[Cit-]

Your Answer

Close [X]