Organic chem 2

In which of the following would calcium phosphate have the greatest solubility?

• 0.1 M aqueous sodium phosphate

• Distilled water

• 0.1 M aqueous calcium nitrate

• Saturated aqueous hydroxide

• 0.1 M aqueous phosphoric acid

What is the relationship between the spontaneity of a reaction and how fast (or slow) the reaction proceeds?

What is the definition of a spontaneous reaction?

BF₃ + : NH₃ ----> F₃ B: NH₃

BF₃ + : NH₃ ----> F₃ B: NH₃

Which statement is not correct?

• An electrochemical cell can extract electrical energy from a non-spontaneous reaction.

• All electrochemical cells have at least two electrodes.

• A voltaic cell is a type of electrochemical cell.

• Reduction occurs at the cathode in an electrochemical cell.

• A battery is an example of an electrochemical cell.

Which of the following describes an oxidation half-reaction?

• Decrease in oxidation number

• Loss of electrons

• Pure oxygen becoming an oxide ion

• Reactant acting as an oxidizing agent

Which cell notation represents a battery constructed using zine and iron, with electrons flowing from zinc to iron?

• Fe ³⁺ (aq) | Fe²⁺(aq) || Zn (s) | Zn²⁺(aq)

• Fe³⁺ (aq) | Fe (s) || Zn (s) | Zn²⁺ (aq)

• Zn (s) | Zn ²⁺(aq) || Fe³⁺(aq) | Fe²⁺ (aq)

• Zn (s) | Zn²⁺ (aq) || Fe³⁺ (aq) | Fe (s)

• Zn (s) | Zn²⁺ (aq) || Fe (s) | Fe³⁺ (aq)

Label the diagram

A redox reaction has a large positive E o Cell. We should expect a ________ value for Gibb’s Free Energy and _______ value for K

• Positive, Small

• Positive, Large

• Negative, Small

• Negative, Large

• These cannot be predicted from the value for E^o Cell.