Wednesday
April 16, 2014

Homework Help: college chemistry

Posted by Lucinda on Thursday, May 27, 2010 at 7:03am.

In the analysis of food, the nitrogen from the protein is sometimes converted into ammonia which is titrated against a strong acid. Given that the final NH3 concentration (approximate) is 0.2M and that pKa for NH4+ is 9.2, choose the best indicator for such a titration

phenolphthalein - pKa 9.2
thymol blue - pKa 8.9
methyl orange - pKa 3.7
bromothymol blue - pKa 7.0
methyl red - pKa 5.1

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

CHEMISTRY - In the analysis of food, the nitrogen from the protein is sometimes ...
Chemistry - Ammonia (NH3) is a weak base with a Kb= 1.8 X 10^-5 and hydrochloric...
CHEMISTRY - A question asks to find out the pH at the half-neutrilization point...
chemistry - A 0.0875 M solution of aqueous ammonia was titrated with a solution ...
chemistry - The pKb of ammonia solution, NH3(aq) is 4.76. A buffer solution ...
Chemistry - The weak base-conjugate acid buffer used in this laboratory consists...
Chemistry - Given the following equation: NH3 + NH3 +O2 NO + H2O Calculate ...
Chemistry; Acid-Base Equilibrium - You are farming and loving life. You love the...
Chemistry; Acid-Base Equilibrium - You are farming and loving life. You love the...
Chemistry - Ammonia has the formula NH3. Household ammonia is a dilute aqueous ...

Search
Members