CHEM 1020 CLEMSON TEST 3
What are the strong acids? - ANSHCl, HBr, HI, HClO4, H2SO4, HNO3
According to Bronsted-Lowry theory, define acids and bases. - ANSAcids are substances which
donate H+ in solution (to water)
Bases are substances which accept H+ in solution (from water)
What is Ka? - ANSThe acid ionization constant-----> [A-][H3O+]
----------
[HA]
What is Kb? - ANSThe base ionization constant . [HB+] [OH-]
---------
[B]
Which will have a larger Ka in solution- a strong or weak acid? - ANSStrong acid will have a
larger Ka, since strong acids dissociate completely and K is products/reactants, so if the acid
completely dissociates, products will be favored
What are conjugate acid base pairs? - ANSChemical species whose formulas differ by a single
proton
For a binary acid H-A, what happens to the strength of the acid as the electronegativity of A
increases? - ANSAcid strength increases because of the increase in bond polarity
For a binary acid H-A, what happens to the strength of the acid as the size of A increases? -
ANSAcid becomes stronger, since conjugate base is more stable
Are non metal hydroxides (polar covalent bonding) usually acids or bases? - ANSAcids
Are metal hydroxides (ionic bonding) usually acids or bases? - ANSBases
Describe an oxyacid - ANSOxyacids are nonmetal hydroxides. They contain hydrogen and
oxygen bonded to a nonmetal
What are three factors that effect the strength of oxyacids? - ANSElectronegativity of central
atom
Oxidation number of central atom
Number of oxygens bonded to central atom
What is the oxidation number of fluorine? - ANS-1
What are the strong acids? - ANSHCl, HBr, HI, HClO4, H2SO4, HNO3
According to Bronsted-Lowry theory, define acids and bases. - ANSAcids are substances which
donate H+ in solution (to water)
Bases are substances which accept H+ in solution (from water)
What is Ka? - ANSThe acid ionization constant-----> [A-][H3O+]
----------
[HA]
What is Kb? - ANSThe base ionization constant . [HB+] [OH-]
---------
[B]
Which will have a larger Ka in solution- a strong or weak acid? - ANSStrong acid will have a
larger Ka, since strong acids dissociate completely and K is products/reactants, so if the acid
completely dissociates, products will be favored
What are conjugate acid base pairs? - ANSChemical species whose formulas differ by a single
proton
For a binary acid H-A, what happens to the strength of the acid as the electronegativity of A
increases? - ANSAcid strength increases because of the increase in bond polarity
For a binary acid H-A, what happens to the strength of the acid as the size of A increases? -
ANSAcid becomes stronger, since conjugate base is more stable
Are non metal hydroxides (polar covalent bonding) usually acids or bases? - ANSAcids
Are metal hydroxides (ionic bonding) usually acids or bases? - ANSBases
Describe an oxyacid - ANSOxyacids are nonmetal hydroxides. They contain hydrogen and
oxygen bonded to a nonmetal
What are three factors that effect the strength of oxyacids? - ANSElectronegativity of central
atom
Oxidation number of central atom
Number of oxygens bonded to central atom
What is the oxidation number of fluorine? - ANS-1
