Calculate the value of the [Fe3+]/[Fe2+] if 3 cm3 of the 0.05 M Fe3+ solution is added to 25 cm3 of the 0.05 M Fe2+ solution
To calculate the value of [Fe3+]/[Fe2+], we need to determine the moles of Fe3+ and Fe2+ in each solution.
Given:
Volume of Fe3+ solution (V1) = 3 cm^3
Molarity of Fe3+ solution (M1) = 0.05 M
The moles of Fe3+ can be calculated using the formula:
moles = Molarity * Volume (in liters)
Moles of Fe3+ (n1) = M1 * V1 / 1000 (converting cm^3 to liters)
= 0.05 * 3 / 1000
= 0.00015 mol
Now, let's look at the Fe2+ solution.
Volume of Fe2+ solution (V2) = 25 cm^3
Molarity of Fe2+ solution (M2) = 0.05 M
Moles of Fe2+ (n2) = M2 * V2 / 1000 (converting cm^3 to liters)
= 0.05 * 25 / 1000
= 0.00125 mol
Finally, we can calculate [Fe3+]/[Fe2+] by dividing the moles of Fe3+ by the moles of Fe2+:
[Fe3+]/[Fe2+] = n1 / n2
= 0.00015 / 0.00125
= 0.12
Therefore, the value of [Fe3+]/[Fe2+] is 0.12.
To calculate the value of [Fe3+]/[Fe2+], we need to determine the number of moles of Fe3+ and Fe2+ in each solution.
First, let's calculate the number of moles of Fe3+ in the 3 cm³ of the 0.05 M Fe3+ solution:
Number of moles of Fe3+ = concentration (M) × volume (L)
= 0.05 mol/L × 0.003 L
= 0.00015 mol
Next, let's calculate the number of moles of Fe2+ in the 25 cm³ of the 0.05 M Fe2+ solution:
Number of moles of Fe2+ = concentration (M) × volume (L)
= 0.05 mol/L × 0.025 L
= 0.00125 mol
Now, we can determine the ratio of [Fe3+]/[Fe2+]:
[Fe3+]/[Fe2+] = (moles of Fe3+) / (moles of Fe2+)
= 0.00015 mol / 0.00125 mol
= 0.12
Therefore, the value of [Fe3+]/[Fe2+] is 0.12.
Is this before or after the disproportionation.
Before:
(Fe^3+) =- 0.05 x 3/28 = ?
(Fe^2+) = 0.05 x 25/28 = ?
or more simply, it is
[(0.05 x 3/25)/(0.05 x 25/28)] or just 3/25 = ?