The synthetic permeable membrane used in Berkeley-Hartley method is:A) Copper ferrocyanideB) Copper ferricyanideC) Potassium ferricyanideD) Potassium ferrocyanide

The correct answer is D) Potassium ferrocyanide.

Explanation:
The Berkeley-Hartley method is a technique used in the separation and estimation of certain ions in a solution, particularly in analytical chemistry. This method utilizes a synthetic permeable membrane that allows specific ions to pass through while retaining others.

Potassium Ferrocyanide: This is the synthetic membrane material commonly used in the Berkeley-Hartley method. It creates a selective barrier that can facilitate the transport of certain ions based on their size and charge. The use of potassium ferrocyanide allows the desired ions to pass through while blocking others, making it effective for separation processes.

Copper Ferrocyanide and Copper Ferricyanide: While these compounds can also be used in some electrochemical processes, they are not typically associated with the Berkeley-Hartley method.

Potassium Ferricyanide: Similar to copper compounds, this is also not used as a membrane in the Berkeley-Hartley method.

In summary, potassium ferrocyanide is selected as the permeable membrane because of its effectiveness in allowing specific ions to permeate while preventing the passage of undesired ions, which is a critical aspect of the Berkeley-Hartley method in analytical applications.