General Chemistry Questions & Answers

General Chemistry Questions & Answers Adhesion - CORRECT ANSWER - An attraction between molecules of different substances Arrhenius acid - CORRECT ANSWER - substance that contains hydrogen and yields hydrogen ions in aqueous solution. Arrhenius base - CORRECT ANSWER - substance that contains hydroxide ion and yields hydroxide ions in aqueous solution Arrhenius neutralization reaction - CORRECT ANSWER - acid +base salt + water Avogadro's Law - CORRECT ANSWER - V1/n1=V2/n2 barbiturate - CORRECT ANSWER - drugs that depress the activity of the central nervous system, reducing anxiety but impairing memory and judgment Boyle's Law - CORRECT ANSWER - P1V1=P2V2 Brønsted-Lowry theory - CORRECT ANSWER - acid donates H+ and base accepts H+ bases may not have OH- but must have a lone pair of electrons every acid has its conjugate base and every base has its conjugate acid buffer solution - CORRECT ANSWER - a solution made from a weak acid and its conjugate base or strong acid and weak base or strong acid and strong base (equal amount of moles) that neutralizes small amounts of acids or bases added to it, helps maintain a constant pH. (from a salt containing a common ion as a conjugate base ). Charles' Law - CORRECT ANSWER - V1/T1=V2/T2 Cohesion - CORRECT ANSWER - Attraction between molecules of the same substance colligative properties - CORRECT ANSWER - Properties that depend on the amount of a dissolved solute but not on its chemical identity. When amount of solute increases: BP and osmotic pressure increase, whereas VP and FP decrease Colloid - CORRECT ANSWER - a homogeneous, noncrystalline substance consisting of large molecules. Colloids are mixtures with particles larger than solute molecules in homogeneous mixtures, but they are too small to drop out of the mixture due to gravity. Particle size: 2 to 500 nm. Critical point on phase diagram - CORRECT ANSWER - a combination at which T and P are beyond which a gas cannot be liquefied