Salt Bridge
Product Code : EL-E-10980
Quick answer: The Salt Bridge is an inverted U-tube with both ends closed by sintered discs, with 13 mm diameter arms and an overall size of 80 x 100 mm. Filled with a salt solution, it joins two half-cells so ions can flow between them while the solutions stay apart, as in the Daniell cell. Lab Exports manufactures it in Delhi for schools, colleges and universities.
Specifications
| Item | Detail |
|---|---|
| Construction | Inverted U-tube |
| Ends | Closed by sintered discs |
| Arm diameter | 13 mm |
| Size (W x H) | 80 x 100 mm |
How the salt bridge is used
A galvanic cell has two half-cells, for example zinc in zinc sulfate solution and copper in copper sulfate solution. When the electrodes are joined by a wire, electrons flow from zinc to copper, but the circuit is only complete if ions can also move between the two solutions. The salt bridge provides that path: its negative ions drift towards the zinc half-cell and its positive ions towards the copper half-cell, keeping both solutions electrically neutral.
The sintered discs at the ends let ions pass while stopping the bridge solution from running out or mixing in bulk with the half-cell solutions, so the bridge can be lifted out, rinsed and used again.
- Fill the U-tube with a concentrated solution of an inert salt such as potassium nitrate.
- Set up the two half-cells in separate beakers.
- Invert the salt bridge so that one arm dips into each beaker.
- Connect the electrodes through a voltmeter and read the cell voltage.
- Remove the bridge after the reading, rinse the ends and refill it for the next pair of half-cells.
Key features
- Inverted U-tube, the standard shape for joining two half-cells
- Sintered disc ends allow ion flow but prevent bulk mixing
- 13 mm diameter arms
- Compact 80 x 100 mm size for beaker-based cells
- Suits galvanic and electrolytic cell experiments
Documentation and supply
Most Lab Exports products carry a one-year manufacturer warranty.
Lab Exports manufactures the salt bridge at its works in Laxmi Nagar, Delhi, and supplies it to schools, colleges and universities in India and 60+ countries, handling the export documents for each shipment. More about the company is on the About Lab Exports page.
Related Electrolysis products
- Simple Cell, Student Kit (EL-E-10979)
- Fruit Clock (EL-E-10981)
- Student Gas Voltameter (EL-E-10978)
- Electrolysis Cells (EL-E-10982)
- S Shape Electrodes (EL-E-10977)
- Electrode Connector (EL-E-10983)
The full range is in the Electrolysis section of the Chemistry Lab range.
Frequently asked questions
What is a salt bridge used for?
It connects two half-cells so that ions can flow between them and keep both solutions electrically neutral, completing the circuit of an electrochemical cell.
What size is the salt bridge?
80 x 100 mm (W x H), with 13 mm diameter arms.
What is the price of the salt bridge?
Prices are not published on the website. Add the salt bridge to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code EL-E-10980 and the quantity, to receive a quotation.
Does Lab Exports manufacture the salt bridge?
Yes. Lab Exports manufactures the salt bridge at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code EL-E-10980.
Request a quote
Email [email protected] with the house code EL-E-10980 and the quantity, or add the salt bridge to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.
