Stxxbb6brienez
Stxxbb6brienez Stxxbb6brienez
  • 11-04-2016
  • Chemistry
contestada

If the Kb of a weak base is 4.6 × 10-6, what is the pH of a 0.32 M solution of this base?

Respuesta :

meerkat18
meerkat18 meerkat18
  • 19-04-2016
Assuming that the given base is a weak monoprotic base, the pH of the solution can be calculated as follows:

Write the balanced reaction and ice chart:

          BOH -->  OH- + B+

i           0.32        0         0
c            -x           x          x
e       0.32-x        x          x

Kb = x^2/ (0.32-x)
x = 1.21x10^-3 = [OH-]
pOH = -log[OH-] = -log[1.21x10^-3] = 2.917
pH = 14 - pOH = 14 - 2.917 = 11.08

Answer Link

Otras preguntas

Can I Just get the work for s=-16t^2+45t+400 I know the answer is 5.211 but idk how they got it
a six sided die was rolled nine times . what is the mode of these rolls 4 5 1 2 4 3 6 2 4
A single tree produces about 2.6 x 10^2 lb of oxygen each year.The Amazon rainforest has about 3.9 x 10^11 trees.About how many pounds of oxygen are produced in
which number is a factor or 20 but not a multiple of 2?
what does 3/5 equal to as a decimal
The true conditional statement, "If 5x + 7 = 2x - 1, then 3x + 7 = -1," illustrates which property of equality? Addition Property of Equality Subtraction Proper
please help find out what is b/3+17=48
how do you simplified 7a(3b-2c+4)
please I need help on 2 multiple choice question about a book Angela's Ashes. 1—In Angela's Ashes what sort of treatment does Frank receive for his typhoid feve
The ratio of the area of an equilateral triangle, in square inches, to its perimeter, in inches, is