Chromic acid, H2CrO4 is a diprotic acid,
with pKa values of 0.86 and 6.51. Calculate the total alkalinity
for a water sample containing 10-3 M Na2CO3
and 10-4 M H2CrO4
Phosphoric acid is a triprotic acid, and the Ka values are given
below. Calculate pH, pOH, [H3PO4], [H2PO4 2- ], [HPO4 - ], and [PO4
3- ] at equilibrium for a 5.00 M phosphoric acid solution.
Ka1 = 7.5 x 10-3
Ka2 = 6.2 x 10-8
Ka3 = 4.2 x 10
An enzyme contains an active site aspartic acid with a pka=5.0
which acts as a general acid catalyst. Draw the curve of enzyme
activity vs. pH for the enzyme (assume the protein is stably folded
between pH 2-12 and that the active site Asp is the only ionizable
residue involved in catalysis).Explain the shape of the curve
Calculate the (a) net present value (NPV),
(b) profitability index (PI), and
(c) internal rate of return (IRR) for Projects
1 and 2 (cash flows shown below), assuming a required return of
13%.
Year
Project 1
Project 2
0
-$390
−$420
1
$130
$130
2
$150
$140
3
$130
$150
4
$360
$310
a. What is the NPV of Project 1? $___
(Round to the nearest cent.) What is the NPV of Project 2?
$___ (Round to the nearest...