CHEM 123 Lecture 24: Organic - Acid/Base

T F In primary Galvanic cells a current is used to drive a non-spontaneous

reaction

T F In electrochemical cells, the anode is the electrode where electrons are

gained by the species

T F In electrolytic cells, the cathode is the positive electrode.

T F It takes 1.2 X 10²⁴ electrons to reduce Sn⁺⁴ to Sn⁺²

T F In Galvanic cells the electrons are released at the anode and consumed at

the cathode.

T F The more negative the E^o value for a given reaction, the greater the

tendency for the reaction to occur in the opposite directions as written.

T F The Dry Cell (Le Chanche Cell) is an example of a secondary Voltaic cell

T F Secondary Voltaic cells are non-reversible.

In dilute liquid solutions of Sn and Cd, the majority component, Cd, obeys Raoult’s law and the minority component Sn obeys Henry’s law with the Henrian coefficient, ksn, varying with temperature as lnK Sn=-840/T+1.58

Calculate the heat absorbed or released when 0.01 moles of pure Sn is mixed with 0.99 moles of pure Cd to form one mole of solution at 1000K.