# Electrochemistry: Numerical Problems

Electrochemistry: Numerical Problems
Electrochemistry: Numerical Problems
1- What mass of Cu(s) is electroplated by running 28.5A of current through a Cu 2+ (aq) solution for 4.00 h?Express your answer to three significant figures and include the appropriate units.
2-How many minutes will it take to electroplate 60.1g of gold by running 5.00 A of current through a solution of Au + (aq)? Express your answer to three significant figures and include the appropriate units. Essay help.
3-A Cu/Cu 2+ concentration cell has a voltage of 0.22V at 25 ∘ C. The concentration of Cu 2+ in one of the half-cells is 1.4×10−3M. What is the concentration of Cu 2+ in the other half-cell? Express your answer using two significant figures.
4- Calculate the equilibrium constant for each of the reactions at 25 ∘ C .O 2 (g)+2H 2 O(l)+2Cu(s)→4OH − (aq)+2Cu 2+ (aq) Express your answer using one significant figure.
5-Use tabulated electrode potentials to calculate ΔG ∘ rxn for each reaction at 25 ∘ C .2Fe 3+ (aq)+3Sn(s)→2Fe(s)+3Sn 2+ (aq) Express your answer using two significant figures.
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