Chem 116 Study guides, Class notes & Summaries

dependent upon the overall order of the reaction The units for a rate constant, k, are: dependent upon the overall order of the reaction a rate constant is unitless M^-1 M^-1 s^-1 s^-1 the fraction of collisions with total kinetic energy greater than Ea increases. An increase in the temperature of the reactants causes an increase in the rate of reaction. The best explanation for this behavior is that as the temperature increases, the collision frequency increases. the fraction of coll...

Factors that Affect the rate of the reaction: - physical state of the reactants. concentration of the reactants. temperature of the reaction. presence or absence of a catalyst. (Collision energy, collision frequency, collision orientation) In a rate expression... - the products will be positive and the reactants will be negative Intermediate - is first produced, then used as a reactant Catalyst - CRP, reactant than product

CHEM 116 Exam 3 Practice Test Qs&As 2024 Which of the following combinations cannot produce a buffer solution? - ANS-HNO3 and NaO3 Consider an indicator (kHIn= 6.3 x 10^-6) that ionizes as shown below. Which of the following statements is true? HIn + H20 (yellow) <----> H3O+ +In- (blue) - ANS-In acidic solutions containing the indicator, we would expect predominantly yellow color Which of the following solubility product expressions is correct? - ANS-AuI, ksp= [Au+][I-] In the tit...

the cations of strong bases have what affect on pH(if placed in their own solution?no affect; do not react with water the cations that are conjugate acids of weak bases have what affect on pH (if placed in their own solution)?lowers the pH of the solution the cations that are small and highly charged metals have what affect on pH?lowers the pH of a solution the anions of strong acids (when placed in their own solution) have what affect on pH?no affect; do not react in water.

The first law of thermodynamics can be given as DeltaE = q+w A reaction that is spontaneous as written will proceed without outside intervention Of the following (S, H, q, E, T), only ___ is NOT a state function. q When a system is at equilibrium the process is not spontaneous in either direction A reversible process is one that an be reversed with no net change in either system or surroundings. The thermodynamic quantity that expresses the degree of disorder in a system is entropy

Chemistry is the study ofmatter MatterAnything that has mass and takes up space Solidshave a fixed volume and shape Liquidshave fixed volume but not a fixed shape Gaseshave no fixed volume or shape Pure substanceA sample of matter, either a single element or a single compound, that has definite chemical and physical properties

CHEM 116 Exam 3 Practice Test Qs&As 2024 Which of the following combinations cannot produce a buffer solution? - ANS-HNO3 and NaO3 Consider an indicator (kHIn= 6.3 x 10^-6) that ionizes as shown below. Which of the following statements is true? HIn + H20 (yellow) <----> H3O+ +In- (blue) - ANS-In acidic solutions containing the indicator, we would expect predominantly yellow color Which of the following solubility product expressions is correct? - ANS-AuI, ksp= [Au+][I-] In the tit...

What are the 5 types of intermolecular forces? 1. Dispersion 2. Hydrogen bonding 3. Dipole-dipole 4. Ion-dipole 5. Ion-Ion Dispersion forces the weakest intermolecular force; a temporary attractive force that results when the electrons in two adjacent atoms occupy positions that make the atoms form temporary dipoles Hydrogen bonding forces stronger than dispersion forces its an attraction of hydrogen to O, F, and N Dipole-dipole forces intermolecular forces that exist between polar m...

Chemical kinetics - the study of how fast a chemical reaction proceeds from reactant(s) to product(s) and the mechanism by which the reaction occurs Reaction rate - change in concentration of reactant(s) or product(s) per unit of time Most reactions don't go a ______ speed and will __________ as reactants ________ - steady; slow down; decrease rate law - expression that shows how rate depends on concentration of reactants 1st order - k units - 1/m s

Which of the following statements about chemical reaction rates is false? - The Activation energy, Ea, will always be greater than the change in enthalpy, (change in H) Which of the following statements about chemical reaction rates is true? - -Most reactions proceed faster if the concentration of one or more of the reactants is increased -Sometimes changing the concentration of a reactant has no effect on the reaction rate for a net chemical reaction. -The physical state of reactants is a...