Molecular Structure of Acids and Bases
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AP Chemistry › Molecular Structure of Acids and Bases
Put the following acids in order of their INCREASING acid strength: HI, HCl, HBr, HF.
HI, HCl, HBr, HF
HF, HCl, HBr, HI
HI, HBr, HCl, HF
HF, HBR, HI, HCl
HCl, HBr, HI, HF
Explanation
Larger halogen size leads to greater acidity because of weaker H-X interactions.
Put the following in order of INCREASING acid strength: H2Se, KH, AsH3, HBr.
KH, AsH3, H2Se, HBr
HBr, H2Se, AsH3, KH
AsH3, H2Se, HBr, KH
AsH3, H2Se, KH, HBr
KH, H2Se, AsH3, HBr
Explanation
Acid strength increases going across a period.
Put the following acids in order of their INCREASING acid strength: HCl, HS, HBr, H2Se.
HCl, HS, HBr, H2Se
H2Se, HBr, HS, HCl
HBr, H2Se, HCl, H2S
H2S, HCl, HBr, H2Se
H2S, H2Se, HCl, HBr
Explanation
Acid strength increases from left to right across a period and increases going down a group.
Put the following acids in order of their DECREASING acid strength: HOCl, HOBr, HOI, H2O.
HOCl, HOBr, HOI, H2O
H2O, HOI, HOBr, HOCl
HOI, HOBr, HOCl, H2O
H2O, HOCl, HOBr, HOI
HOCl, H2O, HOBr, HOI
Explanation
Acid strength of an oxy acid increases with increasing electronegativity on the halogen.
Put the following acids in order of their DECREASING acid strength: HOCl, HO2Cl, HO3Cl, HO4Cl.
HOCL, HO2Cl, HO3Cl, HO4Cl
HOCl, HO4Cl, HO2Cl, HO3Cl
HO4Cl, HO3Cl, HO2Cl, HOCl
HO4Cl, HOCl, HO2Cl, HO3Cl
HO2Cl, HOCl, HO3Cl, HO4Cl
Explanation
For an oxyacid, the acid strength increases as the number of oxygens increase.