1) Determine the oxidation number of the central atom in the acids?

H2SO4

HCO3-

HNO3

H2PO4-

HCIO4

2) Draw all possible resonance structures for the following

CIO4-

C6H6

3) Determine the ph ( to 1 decimal place) of a slution prepered by adding 125ml of 0.759M acetic acid to 10.3g of sodium acetate. the pKa of acetic asid is in table 10.2. Assume the volume of the solution does not change ?

4) Arrange the following componants in ordar increasing acid strenght ( from weakest to strongest )

H2O , HN3 , HF , CH4

5) Sketch the titration curves and indicate the pH range at equivalent poird for the following acid-basw titration

strong acid with weak base

strong base with strong acid