General Chemistry Questions & Answers

General Chemistry Questions & Answers Absorption frequency - CORRECT ANSWER - Each atom has a characteristic absorption frequency at which it absorbs energy acid dissociation constant - CORRECT ANSWER - Ka = [H3O+][A-]/[HA] Since stronger acids dissociate more readily, the dissociation reaction of a strong acid favors the products. Thus, the resulting Ka value is higher. Acidity trend - CORRECT ANSWER - Adiabatic system - CORRECT ANSWER - no heat exchanged ΔU=w, Q=0 alkali metals (group 1) - CORRECT ANSWER - possess only one valence electron and are highly reactive Alkaline Earth Metals (Group 2) - CORRECT ANSWER - quite reactive As a general rule of thumb, the elements at the far left of the periodic table are highly reactive compared to elements in the center of the periodic table Alpha decay - CORRECT ANSWER - occurs when an atom releases an alpha particle. This alpha particle can be represented as: 4/2He or 4/2α Amphoteric species - CORRECT ANSWER - species that act as either acids or bases Analyte - CORRECT ANSWER - reactant that is of unknown concentration in a titration Anions - CORRECT ANSWER - negatively charged ion Arrhenius equation - CORRECT ANSWER - K= rate constant A= frequency factor (how often molecules collide) e= 2.72 Ea= activation energy R= ideal gas constant T= temp Atomic mass - CORRECT ANSWER - The average mass of all the isotopes of an element