If some NH4Cl is added to an aqueous solution of NH3:
A.
the pH of the solution will decrease
B.
the solution will not have pH
C.
NH4Cl cannot be added to NH3
D.
the pH of the solution will increase
E.
the pH of the solution will not change
The mole fraction of an aqueous solution of magnesium sulfite is
0.29. Calculate the molarity (in mol/L) of the magnesium sulfite
solution, if the density of the solution is 1.38 g
mL-1.
Determine the mole fraction of
magnesium bromide in a 5.51 M aqueous solution of magnesium
bromide. The density of the solution is 1.17 g
mL-1.
a. Calculate the pH of a 0.538 M aqueous
solution of ethylamine
(C2H5NH2,
Kb = 4.3×10-4)
b. Calculate the pH of a 0.0473 M aqueous
solution of piperidine
(C5H11N, Kb =
1.3×10-3).
1. A student prepares two aqueous solutions. For each
solution:
-Calculate the molarity.
-Write a chemical equation representing the formation of the
solution. Be sure to include phase labels and to show any ions that
dissociate.
-Draw a molecular picture of the solution showing any ions,
solute molecules and water molecules.
A. 2.91 g Na2CO3 to make 25.0 mL
solution.
B. 6.14 mL ethanol (d=0.789 g/mL) to make 75.0 mL of
solution.
C. Which solution is more concentrated?
D. Identify...
What mass of NH4Cl must be added to 250.0 mL of 0.200 M NH3
solution to have a buffer solution at pH=8.90? Assume no volume
change.
A 15.0-mL sample of a H3PO4 solution is titrated with a 1.00 M
NaOH solution. The neutralization reaction is complete when 33.6 mL
of NaOH is added. What is the concentration of the H3PO4 solution
(in M)?
what is the molarity? calculate the molarity of solution
containing 0.652 mol of glucose C6h12o6 in 255000 g of water
a solution contains 150.0 g of water (mw = 18.0 g/mol) and 50 g
of ethanol (MW = 44.0 g/mol ) wat are the mole fraction of water
and ethanol,and vapor pressure of the solution at 25 C (p water =
23.8 torr; p ethanol =58.7 torr)