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BCH 100 MT 1 questions with 100% correct answers graded A+ already passed
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BCH 100 MT 1 questions with 100% correct answers graded A+ already passed
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BCH 100 MT 1Amphipathic - correct answer ✔✔Both hydrophobic and hydrophilic
Molecules that contain one or more hydrophobic and one or more hydrophilic regions
Hydrophilic - correct answer ✔✔Water-loving
-Polar covalent compounds such as low-molecular-weight alcohols and ketones
-Sugars
-Ionic compounds
-Amino acids and phosphate esters
Hydrophobic - correct answer ✔✔Water-hating
-Nonpolar covalent compunds such as hydrocarbons
-Fatty acids and cholesterol
Micelle - correct answer ✔✔Spherical arrangment of amphipathic organic molecules in water clustered
so that hydrophobic parts are buried inside the sphere and hydrophilic parts are on the surface of the
sphere and in contact with the water enviornment
Bronsted Acid - correct answer ✔✔A proton donor
Bronsted Base - correct answer ✔✔A proton acceptor
Strong Acid - correct answer ✔✔An acid that is completely dissociated in aqueous solution
-HCl, HBr, HI, HNO3, HClO4, H2SO4
Strong Base - correct answer ✔✔A base that is completely dissociates in aqueous solution
-LiOH, NaOH, KOH, Ca(OH)2, Ba(OH)2
, Weak Acid/Base - correct answer ✔✔Not completely dissociated in aqueous solution
-Carboxylic acids, H2O
(acid): low Ka, high pKa
Titration Curve - correct answer ✔✔pH vs. equivalents of OH-
Used to determine amount of the weak acidic group in the soln = mols of OH- required to completely
deprotonate each acidic group
Equivalence point: the point in an acid-base titration at which enough strong base has been added to
exactly neutralize the weak acid
Buffer - correct answer ✔✔Aqueous system that tends to resist changes in pH when small amounts of
acid or base are added
Why is water a polar molecule? - correct answer ✔✔Because of the difference in electronegativity
between oxygen and hydrogen and its asymmetrical shape
Why are polar and charged molecules so soluble in water? - correct answer ✔✔Electrostatic attraction of
opposing charges
Water is an excellent solvent for what? - correct answer ✔✔1. Ions/charged groups
2. Neutral polar compounds
4 Types of Noncovalent Interactions - correct answer ✔✔1. Hydrogen bonds
2. Ionic Interactions
3. Van der Waals Interactions
4. Hydrophobic interactions
Hydrogen Bonds - correct answer ✔✔Attractive interaction between dipoles
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