Salt Bridge Construction and Function

This video tutorial demonstrates how to create a salt bridge using a U-tube, rubber stoppers, and filter paper. The process involves filling the U-tube with sodium sulfate, assembling the bridge with filter paper and stoppers, and ensuring there are no leaks. The completed salt bridge is then placed in a container for use.

What materials are needed to construct a salt bridge?

• A test tube, cork, and a thermometer

• A beaker, sodium chloride, and a funnel

• A glass rod, rubber tubing, and a pipette

• A U-tube, rubber stoppers, and filter paper

What is the purpose of using a waste beaker during the salt filling process?

• To measure the exact amount of salt

• To prevent spills and collect excess salt

• To mix the salt with water

• To heat the salt for better solubility

Which salt is used in the demonstration for the salt bridge?

• Sodium chloride

• Calcium carbonate

• Sodium sulfate

• Potassium nitrate

How should the filter paper and stopper be positioned in the U-tube?

• The filter paper should be completely inside the U-tube

• The filter paper should touch the salt and hang out the other end

• The filter paper should be wrapped around the stopper

• The stopper should be placed first, then the filter paper

What is the main reason for inverting the U-tube quickly after assembly?

• To mix the salt solution thoroughly

• To ensure the filter paper is saturated

• To remove air bubbles from the salt

• To check for leaks in the assembly

What should be checked after assembling the salt bridge?

• The color of the salt

• The length of the filter paper

• The temperature of the salt solution

• The position of the filter paper and absence of leaks

Why is it acceptable to have a little overflow of salt during the process?

• It helps in balancing the salt levels

• It ensures the filter paper is fully covered

• It indicates the salt is fully saturated

• The waste container will catch the excess

What is the role of the filter paper in the salt bridge?

• To provide a path for ion flow

• To act as a barrier for the salt

• To absorb excess moisture

• To support the U-tube structure

What is the final step in the salt bridge construction process?

• Adding more salt to the U-tube

• Placing the salt bridge in a container

• Sealing the ends of the U-tube

• Heating the salt bridge

What is the purpose of using a secondary container for the salt bridge?

• To mix the salt with other chemicals

• To heat the salt bridge

• To store the salt bridge safely

• To measure the salt concentration