Consider the following pH indicators and their pH range:
Methyl orange: 3.2-3.4
Methyl red: 4.8-6.0
Bromothymol blue: 6.0-7.6
Phenolphthalein: 8.2-10.0
Alizarin yellow: 10.1-12.0
Assume an indicator works best when the equivalence point of a titration comes in the middle of the indicator range. For which of the following titrations would methyl red be the best indicator?
a. 0.100 M aniline ( K b=3.8 x 10 -10) + 0.100 M HCl
b. 0.100 M HNO3 + 0.100 M KOH
c. 0.100 M HF (Ka=7.2 x 10-4) + 0.100 M NaOH
d. 0.100 M acetic acid (Ka=1.8 x 10 -5) + 0.100 M NaOH
e. 0.100 M NH3 ( Kb=1.8 x 10-5) + 0.100 M HCl
I would be so thankful if anybody can answer this, I have no idea where to start!
Methyl orange: 3.2-3.4
Methyl red: 4.8-6.0
Bromothymol blue: 6.0-7.6
Phenolphthalein: 8.2-10.0
Alizarin yellow: 10.1-12.0
Assume an indicator works best when the equivalence point of a titration comes in the middle of the indicator range. For which of the following titrations would methyl red be the best indicator?
a. 0.100 M aniline ( K b=3.8 x 10 -10) + 0.100 M HCl
b. 0.100 M HNO3 + 0.100 M KOH
c. 0.100 M HF (Ka=7.2 x 10-4) + 0.100 M NaOH
d. 0.100 M acetic acid (Ka=1.8 x 10 -5) + 0.100 M NaOH
e. 0.100 M NH3 ( Kb=1.8 x 10-5) + 0.100 M HCl
I would be so thankful if anybody can answer this, I have no idea where to start!
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0.100 M NH3 (Kb=1.8x10^-5) + 0.100 M HCl