Precipitation
of
Ni2+
from
a
25
mL
aliquot
of
a
solution
of
unknown
concentration
yielded
0.338
g
of
Ni(DMGH)2.
Calculate
the
concentration
of
the
Ni2+
solution
To calculate the concentration of the Ni2+ solution, you need to know the moles of Ni(DMGH)2 formed from the precipitation reaction and the volume of the original 25 mL aliquot.
First, let's calculate the moles of Ni(DMGH)2:
- Convert the given mass of Ni(DMGH)2 (0.338 g) to moles by dividing by its molar mass.
- The molar mass of Ni(DMGH)2 can be determined by adding up the atomic masses of the elements: 2 nitrogen (N) atoms at 14.01 g/mol each, 6 hydrogen (H) atoms at 1.01 g/mol each, and 1 nickel (Ni) atom at 58.69 g/mol.
Next, let's determine the volume of the original solution in liters:
- Convert the given volume of the aliquot (25 mL) to liters by dividing by 1000.
Finally, we can calculate the concentration of the Ni2+ solution:
- Divide the moles of Ni(DMGH)2 by the volume of the original solution in liters.
By following these steps, we can determine the concentration of the Ni2+ solution.