How many milliliters of 1.27 M KOH should be added to
100. mL of solution containing 10.0 g of histidine hydrochloride
(His·HCl, FM 191.62) to get a pH of 9.30?
1.How many mL of 0.500 M HCl should be added to 155 mL of 0.0500
M benzylamine to form a buffer with pH = 8.52? C7H7NH2 pKb = 4.35
C7H7NH2 (aq) + H+ (aq) C7H7NH3 + (aq) This structure of
benzylamine has a carbon at the junction of each line with 1
hydrogen on each 3-bonded ring C and 2 hydrogens on the C in the
side chain attached to the ring carbon. Note that the N atom has...
calculate how many mL of a 0.32 M solution of HCl must be added to
an aqueous solution containing 4 g of Na2CO3 to obtain a solution
at pH = 10. H2CO3 Ka1 = 4,5x10 -7 Ka2 = 4.8x 10 -10
A. 99,4
B. 80,8
C. 87,5
D. 33,9
Calculate the volume (in mL of a 0.790 M KOH solution that should
be added to 5.500 g of HEPES (MW = 238.306 g/mol, pKa = 7.56) to
give a pH of 7.72.
KOH volume = ______ mL
How many moles of NH4Cl must be added to 100 mL of
0.1 M NH4OH solution to prevent precipitation
of Mn(OH)2 when this solution is added to 100 mL of a
0.002 M solution of MnCl2? Assume no change
involume on addition of NH4Cl.
(a) How many mL of a 0.1 N
solution of NaOH must be added to a 25 mL solution of 0.1 N
Acetic Acid to obtain a pH of 9.75? What is the concentration
of Acetic Acid at this pH?
(b) Answer the same question with the following changes: [Acetic
Acid] = 0.01 N in25mL and the normality of the titrant is
0.02 N. The final pH is 11.
(c) What are the alkalinity and
acidity of a water that...
How many mL of 0.200 M NaOH must be added to 100.0 mL of a
0.0500 F solution of fumaric acid (transbutenedioic acid) to make a
buffer of pH 4.50? Hint: What species do you need in solution to
achieve this pH?