Question

9. If the half reaction had not been chosen to be the standard hydrogen half reaction, how would standard cell potential values have been affected?

Answer 1

* Now the standard reduction ced in combination with Standard cell potential (reduction patential) provides a systematic measurement for different malecules tenday to reduced by taking up electrons. This value is useful in determining the directionality a of a redox reaction. Now the standard Potential of a species is calculated by taking 7 CM) concentra for each ion participating the reaction the metals in their py states and a reference lets he is placed in combinat the it. Now the reduction potential of the Metal/Metal ion, E mnt/m is measure relative to the standard electroade. standard electrode 11 Angelina 110m) Now E cell = E Agility - Estandard eletrode — (i) From this earnation we can calculate Evalue of any metal standard electrode combination. Thus the standard electrode cell potential of any given metal is the difference of its E value and Evalue of standard electrode. By convention we take the standard electrode as standard hydrogen electrode and assign its value as 0. Thas from carnation ci) we can get the standard electrode potential of any medal. * * R- E cell = E Agong *ROI 2011 If we donot assign any particular value to the standaard electrode then every time when we calculate the cell potential we have to adent substract this electrode potential from the standard electrode potential of a metal." Zn/Zn2+ la cu? Ich E call = ( Starlard electrode) - (E ao con- standard electrode) du 2+lan 2n 24 12ny - E ano an2 du- E zn 2 + 1 Zn