Chapters 10-14 Flashcards
- Substances that dissolve in water to produce ions that can conduct an electrical current are called _____________.
Electrolytes
- The effects of changes on equilibrium systems is described by ___________ principle.
Le Chatelier’s
- The study of reaction rates and pathways is chemical _______________.
Chemical kinetics
- The minimum kinetic energy that a molecule must possess to undergo a chemical reaction is the ______________.
Activation energy
- A substance that increases the rate of a chemical reaction without being consumed in the reaction is a(n) ______________.
Catalyst
- Which of the following changes would not increase the rate of a chemical reaction?
Diluting reactant concentrations
- A solution that contains as much dissolved solute as possible under equilibrium conditions is said to be _______________.
Saturated solution
- The theory that when two molecules collide and chemically react they form a short - lived activated complex before breaking apart to form the products is the ___________ theory.
Transition-state
- Which of the following statements about catalyst is true?
A catalyst increases the reaction rate by lowering the reaction’s activation energy
- The rate of a chemical reaction is usually measured as ______________.
Concentration of a given substance per unit of time
- In a solution of sodium chloride in water, water is the _____________.
Solvent
- Which of the following statements best describes a system at equilibrium?
Rates of forward and reverse reactions are equal
- The flow of solvent through a semipermeable membrane from a more dilute solution to a more concentrated solution is called ____________.
Osmosis
- A mixture containing tiny clumps or particles that remain suspended within the mixture and will not settle out is a(n) ______________.
Colloid
- If the temperature of a chemical reaction is increased from 20 degrees celcious to 30 degrees celcious we would ordinarily expect the reaction rate to ______________.
Double
True/False
37. A (nonpolar) substance will be more likely to dissolve in a polar solvent than in a nonpolar solvent.
True
T/F
38. A factor that causes a change in an equilibrium system is called a (disturbance).
Stress
T/F
39. Protein catalysts found in living things are (enzymes).
True
See question 40
True
T/F
41. If a nonvolatile solute such as glucose is added to water, the boiling point will (increase).
True
T/F
42. When a gas is dissolved in water, decreasing the temperature tends to (decrease) the solubility of the gas.
Increase
T/F
43. A chemical system in which the rates of reaction in opposite directions have equalized so that the concentration of reactants and products is constant is in a state of chemical (equilibrium).
True
See questions 44-50
Q
See questions 55- 60
Q
