General Things to know

Question 1

What way does the curly arrow go from an to when doing a electrophilic sub or add mechanism?

Answer 1

It goes from the double bond to the electrophile. (electron pair acceptor)

For benzene it goes from the ring to the electrophile.

Question 2

For bond enthalpy, in general how do we find the enthalpy change?

Answer 2

Bond enthalpy of reactants - Bond enthalpy of products.

Question 3

What is the definition of hess’s law?

Answer 3

The enthalpy change during a chemical change is independent of the steps taken.

Question 4

What is the definition of bond enthalpy?

Answer 4

The mean bond enthalpy is the enthalpy change when one mole of gaseous covalent bonds are broken.

Question 5

What does [HA] mean in the Ka formula?

Answer 5

[HA] = The concentration of the weak acid (using final moles).

Question 6

What does [A-] mean in the Ka formula?

Answer 6

[A-] = The concentration of the OH- ions

Question 7

What does [H+] mean in the Ka formula?

Answer 7

[H+] = The concentration of H+ ions