The production of the chloride salt of an amine will take place best in?
a)acid
b)base
c) neutral pH
d)none of the above
The production of the chloride salt of an amine will take place best in? a)acid b)base...
Provide an acid/base mechanism outlining the production of the (-, +) diasteriomeric salt from (-) amine and tartaric acid Provide an acid/base mechanism outlining the reaction of NaOH with the (-, +) diastereomeric salt to regenerate the (-) amine enantiomer and tartaric acid. show mechanistic arrows
Provide an acid/base mechanism outlining the production of the (-, +) diasteriomeric salt from (-) amine and tartaric acid Provide an acid/base mechanism outlining the reaction of NaOH with the (-, +) diastereomeric salt to regenerate the (-) amine enantiomer and tartaric acid. No Fischer projection. show mechanistic arrows
The mechanism by which acylation of an amine with an acid chloride takes place is: a) electrophilic addition b) nucleophilic aromatic substitution c) nucleophilic addition d) nuceophilic acyl substitution
Out of the following , which is the best acid/base to use to prepare a buffer with a PH of 4.00? a. sodium chloride b. sodium pyruvate c. aniline What ratio of masses of the weak acid/base and its conjugate should you use to make the buffer of the required PH? Use the sodium salt of the conjugate base if you chose a weak acid or the chloride salt of the conjugate acid if you chose a weak base.
A three-component mixture of organic compounds in diethyl ether consists of a carboxylic acid, an amine base, and a neutral compound. After treatment with 3 M HCl and thorough mixing, what compound(s) will be present as major components of the aqueous phase? a)the neutral compound b)the carboxylic acid and the neutral compound c)the amine d)the amine hydrochloride salt
1. The following bases and their conjugate acids (as the chloride salt) are available in the lab: ammonia (NH3); pyridine (C5H5N); ethylamine (CH3CH2NH2). You need to make a buffer with a pH of 9 with a total concentration of buffering agents is to be 0.5M. Considering this, a) Choose the best acid/base pair b) Give the recipe for preparing 1 L of the solution c) Calculate the pH after adding 0.02 moles of NaOH to 1L of the solution
The pH of an aqueous solution of the salt Na SO, (sodium sulfate) will a) be basic (because it is a weak acid-strong base salt) b) be acidic (because it is a strong acid-weak base salt) c) be neutral (because it is a strong acid-strong base salt) d) not be known (because it is a weak acid-weak base salt) e) no correct response
The conjugate acid of ethanol amine (HOCH2CH2NH3+) has pKa = 9.50. What can you conclude about a solution of this amine in which [RNH3+)] = 10 x [RNH2]?) Question 9 options: a) pH = 10.50 b) pH = 9.50 c) pH = 8.50 d) None of the above.
46. Most enzymes function best at a. acidic pH and high salt concentrations b. basic pH and low salt concentrations c. neutral pH and high salt concentrations d. around pH 7 and low salt concentrations 47. Which of the following cells contain respiratory enzymes contained in an internal structure surrounded by membranes? a. plant cells b. Mycobacterium tuberculosis cells c. animal cells d. S. aureus cells e. a &c
Acid Base ⇄ Conjugate Acid Conjugate Base (A) CH3COOH H2O ⇄ (B) NH3 H2O ⇄ (C) ⇄ HF OH− (D) H2O → I− (E) C5H5NH+ H2O ⇄ [H+] [OH−] pH pOH Acid, Base or Neutral (A) 1.0x10−3 M (B) 4.5x10‒8 M (C) 9.45 (D) 1.33