A solution is prepared by dissolving 0.23 mol of hypochlorous acid and 0.27 mol of sodium hypochlorite in water sufficient to yield 1.00 L of solution. The addition of 0.05 mol of HCl to this buffer solution causes the pH to drop slightly.
The pH does not decrease drastically because the HCl reacts with the ________ present in the buffer solution. The Ka of hypochlorous acid is 1.36 10-3. A) H2O
B) H3O+
C) hypochlorite ion
D) hypochlorous acid
E) This is a buffer solution: the pH does not change upon addition of acid or base.
Question 2
For the reaction 2 C4H10 (g) + 13 O2 (g) 8 CO2 (g) + 10 H2O (g)
H is -125 kJ/mol and S is +253 J/K mol. This reaction is ________.
A) spontaneous at all temperatures
B) spontaneous only at high temperature
C) spontaneous only at low temperature
D) nonspontaneous at all temperatures
E) unable to determine without more information
Question 3
The angles between sp2 orbitals are ________.
A) 45
B) 180
C) 90
D) 109.5
E) 120
Reversible amino acid modifications involved in regulation of protein activity
Amino Acid Structure
Movement of fluids and solution tonicity
Natural defenses against stomach acid.
Acid–Base Balance
Oleic acid