Exam 3 Review

Question 1

Electrochemical reaction in a voltaic cell: ____ occurs at the anode ____ occurs at the cathode Anions will migrate toward _____ and cations will migrate toward ______

Answer 1

Oxidation
Reduction
Anode
Cathode

Question 2

Electromotive Force for a Redox Reaction

Answer 2

The measured emf of an electrochemical Cell will be positive

Oxidation potential for a half reaction will have optimists sign to reduction potential

E* will be positive for a spontaneous reaction

Spontaneous when E(red) is more positive than E(red) for the half cell reaction involving oxidation

Question 3

For E* a voltaic cell will

Answer 3

Always be positive

Question 4

Electrolysis of water

Answer 4

Converting water to H+ and OH-

H2O -> H+ + OH-

Question 5

Only Gamma rays travel at the speed of light because

Answer 5

It doesn’t have mass

Question 6

Conversion of a neutron
Beta Decay
Alpha Decay
Positron Decay
Electron Capture

Answer 6

Beta Decay (n-> p)
Alpha Decay (release of a He nucleus)
Positron Decay (p->n) release of a positive e
Electron Capture (p->n) atomic number decreases = lost proton

Question 7

The biological effect of radiation generally involves

Answer 7

Electron excitation upon striking an electron, resulting in loss of electron(s) and production of reactive cations that can undergo further reactions

Question 8

For nonmetals, which element within a family (group) is most likely to form pi bonds

Answer 8

The element at the top of the family

Question 9

Oxygen has an oxidation state of -1 when

Answer 9

It’s in a peroxide

H2O2 ; Na2O2

Question 10

For anhydrides

Answer 10

Remove the H2O