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According to Bronsted-Lowry, an acid is a substance that can donate an electron pair and abase is a substance that can accept an electron pair. |
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HBR is a stronger acid than HI. |
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According to Bronsted-Lowry, an acid is a proton donor and a base is a proton acceptor. |
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Borane (BH3) is a Lewis acid. |
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Carbocations are Lewis bases. |
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The higher the value of the pKa, the weaker the acid. |
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Ammonia is a Bronsted-Lowry base. |
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Ammonium is a Bronsted-Lowry base. |
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Water is a weaker base than ammonia. |
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Trifluoroacetic acid has a lower pKa than acetic acid. |
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A hydrogen attached to an sp carbon is less acidic than a hydrogen attached to an sp2 carbon. |
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A fluorine substituent attached to a carbon exhibits an electron donating inductive effect. |
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An endergonic is associated with reactions that favor the formation of products when equilibrium is reached. |
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Exothermic reactions don't have a positive (+) enthalpy of reaction. |
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The formation of dihydrogen from two hydrogen atoms has a positive entropy of reaction. |
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The benzyl anion is an intermediate in the formation of benzyl chloride from the reaction of benzyl alcohol with concentrated HCL. |
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A protic solvent is one that has a hydrogen atom attached to a strongly electropositive element such as carbon and boron. |
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When drawing mechanisms, chemists generally use curved arrows. The curved arrow begins with Lewis acid and points toward Lewis base. |
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The temporary molecular shape that results from rotation of groups about single bonds is called a constitutional isomer of a molecule. |
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The most stable form of ethane is the staggered form. |
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Benzene is difficult to hydrogenate due to resonance stabilization. |
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When acetic acid is deprotonated the resulting anion is destabilized by resonance. |
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The factors involved in the rotational barrier about a carbon-carbon single bond are together called ring strain. |
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Considering the rotation about the C2-C3 bond of butane, the gauche conformation is more stable than the eclipsed conformation. |
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The heat of formation of a hydrocarbon is the enthalpy (delta H) change for the complete oxidation of the hydrocarbon to its elements. |
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Cyclooctane has a greater strain energy compared to cyclohexane. |
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The C-C-C bond angles in benzene are approximately 109.5 degrees. |
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sec-Butyl bromide and tert-butyl bromide are constitutional isomers. |
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The most stable conformation of trans-isomer 1,2-dimethylcyclohexane has one methyl group axial and the other methyl group equatorial. |
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1-pentyne an index of hydrogen deficiency equal to two. |
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Cyclohexane can be produced from cyclohexyne by the addition of two equivalents hydrogen in the presence of a transition metal catalyst such as platinum, palladium, or nickel. |
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The boat conformation of cyclohexane (is) an intermediate along the interconversion pathway between the two chair forms of cyclohexane. |
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The six carbon atoms in benzene lie in a plane. |
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The index of hydrogen deficiency of benzene is three. |
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