does the conductivity of salt bridge affect emf of cell?

Answer 1

Tecnically speaking, the voltaic cell is measured with a voltmeter with zero loading to a circuit. They did it using a very sensitive bridge circuit in the old days and achieved ohms per volt loading aproaching 100 megohm or higher. Essentially, the cell is measured with no load and the resistance of the salt bridge is a negligable part of the circuit. The stated EMF of a voltaic cell is basically a no-load reading. Any load that the salt bridge becomes a significant part of the restance will result in a non-standard value for the redox reaction producing the EMF. Try setting up a cell and adding resistance parallel to the meter. See how quick it changes.

Answer 2

No. All it will do is affect the ability of the cell to pass current. A salt bridge usually has a high resistance, and so if the cell is connected to a low external resistance and made to do work, the emf will fall due to the high internal resistance of the salt bridge.

Answer 3

purely to characteristic a pair cents nicely worth to the above. interior the liquid state electric powered present day is carried via the circulation of ions not electrons. In organic water there is inadequate ions for present day to bypass, yet once you dissolve sodium chloride there at the instant are sodium ions and chloride ions interior the answer. The ions interior the salt answer develop the conductivity of the answer.

Answer 4

no
salt bridge is an u tube with an inert electrolyte