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Example Questions
Example Question #84 : Reaction Types
Put the following acids in order of their INCREASING acid strength: HI, HCl, HBr, HF.
HF, HBR, HI, HCl
HI, HCl, HBr, HF
HI, HBr, HCl, HF
HCl, HBr, HI, HF
HF, HCl, HBr, HI
HF, HCl, HBr, HI
Larger halogen size leads to greater acidity because of weaker H-X interactions.
Example Question #85 : Reaction Types
Put the following acids in order of their INCREASING acid strength: HCl, HS, HBr, H2Se.
H2Se, HBr, HS, HCl
H2S, H2Se, HCl, HBr
HBr, H2Se, HCl, H2S
HCl, HS, HBr, H2Se
H2S, HCl, HBr, H2Se
H2S, H2Se, HCl, HBr
Acid strength increases from left to right across a period and increases going down a group.
Example Question #86 : Reaction Types
Put the following acids in order of their DECREASING acid strength: HOCl, HOBr, HOI, H2O.
H2O, HOI, HOBr, HOCl
HOCl, H2O, HOBr, HOI
HOCl, HOBr, HOI, H2O
HOI, HOBr, HOCl, H2O
H2O, HOCl, HOBr, HOI
HOCl, HOBr, HOI, H2O
Acid strength of an oxy acid increases with increasing electronegativity on the halogen.
Example Question #1 : Molecular Structure Of Acids And Bases
Put the following acids in order of their DECREASING acid strength: HOCl, HO2Cl, HO3Cl, HO4Cl.
HOCL, HO2Cl, HO3Cl, HO4Cl
HO2Cl, HOCl, HO3Cl, HO4Cl
HO4Cl, HO3Cl, HO2Cl, HOCl
HOCl, HO4Cl, HO2Cl, HO3Cl
HO4Cl, HOCl, HO2Cl, HO3Cl
HOCL, HO2Cl, HO3Cl, HO4Cl
For an oxyacid, the acid strength increases as the number of oxygens increase.
Example Question #92 : Reaction Types
Put the following in order of INCREASING acid strength: H2Se, KH, AsH3, HBr.
KH, H2Se, AsH3, HBr
KH, AsH3, H2Se, HBr
HBr, H2Se, AsH3, KH
AsH3, H2Se, KH, HBr
AsH3, H2Se, HBr, KH
KH, AsH3, H2Se, HBr
Acid strength increases going across a period.
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