Anyone understand chem?

Question

Solve for the by electroplating via electrolysis for each of the following sets of conditions, and then rank the masses by magnitude from smallest largest.

Metal. Reduction half reaction

(Ag). Ag+(aq)+e- ——>Ag(s)

(Al). Al3+(aq)+3e- ——>Al(s)

(Cu). Cu2+(aq)+2e- ——>Cu(s)

(Fe). Fe2+(aq) +2e- ——> Fe(s)

(No). Ni2+(aq) + 2e- ——> Ni (s)

Answer 1

Step 1: calculate the total charge that passed through the cell:

Charge (in Coulomb, or C) = current (in Ampere, or A) x time (in second)

Step 2: convert the total charge (in C) to total charge (in number of moles of electrons)

number of moles of electrons = total charge (in C) / (96,485 C/mole of e)

Step 3: calculate the number of mole of a certain metal would be deposited

number of moles of metal = number of moles of electrons / # electrons transferred

# electrons transferred: for Ag: 1, Al:3; Ni, Fe, and Cu, 2

Step 4: calculate the mass of the metal deposited

mass of metal = number of moles of metal x molar mass

Based on the information you provided,

Cu 0.163 g

Al 0.201 g

Fe 0.322 g

Ag 0.500 g

Ni 0.535 g