Chapter 21.7, Problem 21.11AFP

Interpretation Introduction

Interpretation:

The time required to plate the $1.50gCu$ sculpture from copper sulfate solution has to be determined in minutes.

Concept Introduction:

An electrochemical cell is a device in which a redox reaction is used to convert chemical energy into electrical energy. Such device is also known as the galvanic or voltaic cell.

Galvanic cell consists of two half-cells. The redox reaction occurs in these half-cells. The half-cell in which the reduction reaction occurs is known as the reduction half-cell, whereas the half-cell in which the oxidation reaction occurs is known as the oxidation half-cell.

The relationship between charge, time and the current applied is determined as follows,

$\begin{array}{l}A=\frac{C}{T}\\ \boxed{\begin{array}{c}here,A=Current\\ C=Current\\ T=Time\end{array}}\end{array}$

Moles: One mole is equivalent to the mass of the substance consists same number of units equal to the atoms present in $\text{12}\text{g}$ of ${}^{\text{12}}\text{C}$.

From given mass of substance moles could be calculated by using the following formula,

  $\text{Moles}\text{of}\text{substance }\text{= }\frac{\text{Given}\text{mass}\text{of}\text{substance}}{\text{Molecular}\text{mass}}$