Electrochemistry Calculations

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Questions and Answers

What is the transport number of H+ ions represented by?

t_{H-}

t_{H^{++}}

t_{H}

t_{H^+} (correct)

The distance moved by the boundary in the solution is marked as 'bb' to 'aa'.

False

What voltage equivalent does one gram equivalent carry?

one Faraday

The volume of the moved liquid is calculated as _______.

lac Signup and view all the answers

Which of the following is an advantage of the method for calculating transport number?

More convenient than Hittorf's method Signup and view all the answers

Match the following terms with their correct descriptions:

t_{H^{+}} = Transport number of hydrogen ions Q = Total charge in coulombs lac = Volume moved by the liquid I = Current in amperes Signup and view all the answers

Hydrogen ions move towards the anode during electrolysis.

False Signup and view all the answers

What is the formula used to calculate the transport number of H+ ions?

t_{H^{+}} = rac{96500 imes lac}{1000 imes Q} Signup and view all the answers

Why do H+ ions move towards the cathode during electrolysis?

H+ ions are positively charged and are attracted to the negatively charged cathode. Signup and view all the answers

How is the total electricity (Q) related to current (I) and time (t) in the context of calculating transport number?

Total electricity (Q) is calculated by the formula Q = I * t, where I is the current in amperes and t is the time in seconds. Signup and view all the answers

What is the significance of 96500 Coulombs in the context of Faraday's law?

The number 96500 Coulombs represents the charge of one gram equivalent of any ion, which is fundamental to electrochemical calculations. Signup and view all the answers

Explain why the distance moved by the boundary between two solutions is crucial for calculating the volumes of ions involved.

The distance moved reflects the volume of liquid displaced, which is essential for determining how many gram equivalents of ions are transported. Signup and view all the answers

What equation represents the transport number of H+ ions?

The transport number is represented by the equation $t_{H^{+}} = \frac{96500 \times lac}{1000 \times Q}$. Signup and view all the answers

List two advantages of using the method described for calculating the transport number of H+ ions.

The method is very accurate and more rapid than Hittorf's method. Signup and view all the answers

What changes in the solution occur as H+ ions move towards the cathode?

As H+ ions move towards the cathode, cadmium ions take their place, causing the boundary between the solutions to move upward. Signup and view all the answers

How would the dimensions of distance, area, and volume be expressed in SI units in this electrochemical context?

In SI units, distance is in meters (m), area is in square meters (m²), and volume is in cubic meters (m³). Signup and view all the answers

Study Notes