Explain salt bridge with its functions., Chemistry

Assignment Help:

Salt bridge is a U-shaped tube containing a semi-solid paste of some inert electrolyte like KCl, KNO3, NH4Cl, etc. in agar-agar and gelatin. An inert electrolyte is one which:

(a) Does not react chemically with the solutions in either of the component.

(b) Does not interface with the net cell reaction.

Function of the salt bridge

In the electrochemical cell a salt bridge serves two very important functions:

(i) It allows the flow of current by completing the circuit 

(ii)
 It maintains electrical neutrality.

The transference of electrons from anode to cathode leads to net positive charge around the anode due to increase in the concentration of cations and net negative charge around the cathode due to excess of anions in solutions. The positive charge around the anode will prevent electrons to flow out from it and the negative charge around the cathode will prevent the inflow of electrons at it. The reaction would then, stop, and no current will flow. The salt bridge comes to aid and restores the electrneutrality of the solutions in the two compartments. It contains concentrated solutions of an inert electrolyte the ions of which are not involved in electrochemical reactions. The anions of the electrolyte in the salt bridge migrate to the anode compartment and cations to the cathode compartment. Therefore, the salt bridge prevents the buildup of charges and preserves the flow of current. In the electrochemical cell, the salt bridge can be replaced by the porous partition which allows the migration of ions but does not allow mixing of the two solutions.

 

 


Related Discussions:- Explain salt bridge with its functions.

The maximum amount of ba3(po4)2, If 0.5 mol of BaCl 2 is mixed with 0.20 m...

If 0.5 mol of BaCl 2 is mixed with 0.20 mol of Na 3 PO 4 , the maximum amount of Ba 3 (PO4) 2 that can be formed is 3 BaCl 2 + 2 Na3PO 4 = Ba 3 (PO4) 2 + 6NaCl Here cle

Powerpoint presentation on lipids, Do you do power point assignments and if...

Do you do power point assignments and if you do, what is the turn around time?

Determine the atomic radius of FCC, Atomic radius (r):  As we known, t...

Atomic radius (r):  As we known, the corner atoms do not touch each other. But, each corner atom touches the face centered atoms with the diagonal of the face of the cube as s

Homonuclear diatomics, Normal 0 false false false EN-US...

Normal 0 false false false EN-US X-NONE X-NONE

Explain the orientation of d-orbitals in organic chemistry., There are five...

There are five d-orbitals totally existed. These are designated as  d xy ,  d yz , ,  d xz ,  and . The shapes of these orbitals are explained below:      The three or

Periodic table, Alkali metals belong to S-block ? why?

Alkali metals belong to S-block ? why?

Why conduction band overlaps with valence band in mg, Because Mg is metal. ...

Because Mg is metal. We know from the properties of the metal it will mallable, ductile, and good conductor for electricity. So, for better conduction the conduction band must over

Explain the effects of temperature on multicomponent systems, Explain the E...

Explain the Effects of Temperature on multicomponent systems? For some of the derivations in this chapter, we will need an expression for the rate at which the ratio μ i /T var

Haloform reactions, what is the chemistry behind haloform reactions?

what is the chemistry behind haloform reactions?

What total mass of ammonia was produced in the reaction, When heated calciu...

When heated calcium hydroxide as well as ammonium chloride reacts to produce water vapor ammonia gas and solid calcium chloride. Presume 5.00g of calcium hydroxide as well as 10.00

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd