Which is the best colored indicator to use in the titration of 0.1 M CH3CO2H(aq) with NaOH(aq) ? Why? (Ka of CH3CO2H = 1.8 10-5,Kb of CH3CO2- = 5.6 10-10)
A) Bromcresol Green.The equivalence point for a weak acid titration occurs at low pH.
B) Bromthymol Blue.The pH at the equivalence point is 7.0.
C) Bromcresol Green.The pKa of CH3CO2H and the pKa of the indicator are similar.
D) Phenolphthalein.The pKa of CH3CO2- and the pKb of the indicator are similar.
E) Phenolphthalein.The pH at the equivalence point is near the pKa of the indicator.
Correct Answer:
Verified
Q47: A 50.00-mL solution of 0.0729 M
Q48: The hydroxide ion concentration of a saturated
Q50: An impure sample of sodium carbonate,Na2CO3,is titrated
Q51: A solution containing 10.mmol of CO32- and
Q53: What color change is exhibited by phenolphthalein
Q54: What is the solubility product expression for
Q55: Potassium hydrogen phthalate (KHP)is used to standardize
Q56: The solubility of barium carbonate (BaCO3)in water
Q57: A 25.00-mL sample of propionic acid,HC3H5O2,of unknown
Q121: Which of the following indicators is most
Unlock this Answer For Free Now!
View this answer and more for free by performing one of the following actions
Scan the QR code to install the App and get 2 free unlocks
Unlock quizzes for free by uploading documents