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Why saturated solution of potassium nitrate is used in salt bridge?
Wiki User
∙ 14y ago
Its because Potassium Nitrate is a spectator in most electrochemical cells. Spetator as in it does not react with the other species in the solution that undergo oxidation or reduction.
Wiki User
∙ 14y ago
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What is salt-bridge?
A salt bridge is used in electrochemical voltaic cells. A salt bridge is usually an inverted glass U-tube that connects two beakers together. The salt bridge is filled with a solution of salt; potassium nitrate (KNO3) is frequently used as the salt. Other salt bridges may be filter paper that is saturated with potassium nitrate. The U-tube is plugged on both ends with glass wool or porous plugs. The salt solution does not interfere with redox reactions that take place within a voltaic cell. Let us use for example the voltaic cell: Zn|Zn2+Cu2+|Cu If the Cu2+ ions came in contact with the Zn electrode, the cell would short-circuit. The salt bridge prevents this from happening by completing the circuit. In a way, the salt bridge acts as a screen. As the current is drawn from the cell, metal from the left hand electrode (anode) loose electrons and go into solution. The electrons travel through external wire to right hand electrode ( cathode). Here the metal ions take electrons and deposit as metal. The salt solution in the salt bridge uses its own anions (NO3-), and its own cations (K+) to substitute for the change in charges at the anode & cathode.
What salt bridge is used in a copper zinc electrochemical cell?
Potassium Chloride is the most common salt bridge for this cell Potassium Chloride is the most common salt bridge for this cell
What type of metal will be best to use when making a bridge in salt water?
It may be potassium or ammonium ions And chloride or nitrite ions that have similar mobility in solution
What kind of electrolyte should be used in a salt bridge?
something inert: potassium chloride, sodium chloride
Is it important to have in the salt bridge the same anion in the 2 solution?
no yes
Why the pH meter is always kept in saturated KOH solution?
KCl is a salt having Ph 7, it is highly ionizable.yet a small leakage of ions from the reference electrode is needed, forming a conducting bridge to the glass electrode. A pH meter must thus not be used in moving liquids of low conductivity. Sushant kumar
What is the purpose of the ion bridge?
The idea is to keep two solution in a 'cell' physically separate while allowing current to flow.
Why does my phone battery die so fast?
They die because batteries are essentially a type of electrochemical cell. An electrochemical cells works by reacting 2 different metal solid electrodes with a solution containing the same metals but in an aqueous solution. For example when magnesium electrode is put in a beaker containing magnesium nitrate solution and a silver electrode is put in a silver nitrate solution and the two electrodes are connected together we get electricity flowing through the wire. However when this occurs electrons flow from magnesium electrode to the silver one. When that happens there is a build of a negative charge on the magnesium electrode. At the same time there is a build up of a positive charge on the silver electrode. So we connect a tube called a salt bridge to allow some of the ions in the silver solution to travel to the magnesium solution and vice versa. Now that you know how a battery works you can understand how it stops working. Now as the exchange is happening through the salt bridge to balance the charges on both sides there is a build up on the electrodes. This build prevents the electrode to come in contact with the solutions they are submerged in. When that happens the reaction stops and the battery dies.
What is the server in the data acquisition setup?
The job of the server in a data acquisition setup is to bridge the gap from the meter to dashboard. These servers help to make a complete end-to-end solution.
What and when did we use zinc in science?
Zinc is used in very simple batteries (usualy for demonstration rather than actual power scources.) generaly in chemistry, you make a galvanic cell out of zinc rod, zinc sulphate, copper wire, copper rod, copper sulphate and a salt bridge made of potassium nitrate, and that will give you a small direct current of electrons from the zinc side of the cell to the copper side of the cell and a conventional current from copper to zinc
How do you solve konigsberg bridge problem?
The Seven Bridges of KönigsbergThe Konigsberg Bridge Problem is a historical problem in mathematics. The problem was to find a route to walk through the city of Konigsberg that would cross each bridge ONLY ONCE. You could not walk half way onto a bridge, but had to cross it completely, and islands within the city could only be reached by crossing a bridge Leonhard Euler proved that the problem has no solution.
What ion must be present for binding of the cross bridge?
a. calcium b. sodium c. iron d. potassium
