Material for Exam 3 Flashcards
The Delta G for the electrochemistry is negative & the electrochemistry requires a salt bridge
Galvanic Cells
The main characteristic of secondary cells is…
Secondary cells are rechargeable
Reduction Occurs here
cathode in an electrochemical cell
n = A x t / F
Faradays Law
n = moles electrons
A = Amperes (C/s)
t = time (s)
F = Faradays Constant, 96485 C/mol electrons
The largest E cell
Cathode
the main characteristic of primary cells is…
primary cells are not rechargeable
T / F ? Oxidation always occurs at the anode
True
T / F ? Electrons always flow from the anode to the cathode
True
T / F ? The salt bridge is used to maintain charge balance
True
T / F ? Cations always flow toward the cathode
True
T / F ? Anions always flow toward the anode
True
The oxidation number of hydrogen is +1 when combined w/ a …. The oxidation number of hydrogen is -1 when combined with a …
nonmetal… metal
Which of the following statements about weak acids is false?
A) Weak acids ionize only slightly in dilute aqueous solution.
B) The Ka values for weak acids are numbers that are greater than 1.
C) Weak acids are much more numerous than strong acids.
D) Many weak acids are familiar to us in everyday use.
E) The ionization constant for a weak acid does not include a term for the concentration of water.
B)
Which of the following statements is false?
A) Solvolysis is the reaction of a substance with the solvent in which it is dissolved.
B) Hydrolysis is the reaction of a substance with water.
C) The anion of a weak acid reacts with water to form nonionized acid and OH– ions.
D) According to Brønsted-Lowry the anions of strong acids are very strong bases.
E) The conjugate acid of a strong base is a very weak acid.
D)
