What is the pH of a 1.8 M solution of HClO4?
Assuming complete dissociation, what is the pH of a 3.06 mg/L
Ba(OH)2 solution?
Enough of a monoprotic acid is dissolved in water to produce a
0.0112 M solution. The pH of the resulting solution is 2.65.
Calculate the Ka for the acid.
Determine the pH of each solution.
a) 0.0200 M HClO4
b)0.120 M HClO2 (for HClO2, Ka=1.1×10−2)
c)0.050 M Sr(OH)2
d)0.0856 M KCN (for HCN,
Ka=4.9×10−10)
e)0.165 M NH4Cl (for NH3,
Kb=1.76×10−5)
Calculate the pH of the following solutions: (a) 10-3 M HClO4
(note that for HClO4 the pKa = -7) (b) 10-3 M HOCl (note that for
HOCl the pKa =7.52) (x) 10-6.5 M NaOH (d) 10-3 M NH4Cl (note that
for NH4+ the pKa =9.25)
A water has a temperature of 10o C and pH = 8. What
should be the C.t value for 3-log Giardia removal using (a)
chlorine, (b) chloramine. Assume a chlorine residual of 1.0 mg/L is
required. If the chlorine dosage required to achieve this residual
is 1.6 mg/L, what is the chlorine requirement in lbs/d for a 2 mgd
water plant.
a. What is the pKa of a 0.010 M solution with a pH of 5.24?
b. CaCO3 is dissolved in water. What is the complete
charge balance equation for its dissolution?
If the temperature inside a room is 25°C and the temperature
outside is ?10°C:
a. What is the maximum relative humidity that can be
accommodated inside the room before the window fogs over? (Assume
the inside of the window is not insulated from the outside
temperature).
b. If it is a double-pane window such that the inside of the
window is perfectly insulated from the outside, what will the
maximum relative humidity be?