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Abeka Chemistry Test 8
Terms in this set (45)
The attraction of a substance to the surface of a solid.
A mixture containing tiny clumps or particles that remain suspended within a mixture and will not settle out.
A category that includes emulsions, gels, foams and sols
The type of substance where the scattering of light known as the Tyndall effect is a characteristic of.
The field of chemical kinetics involves both of these.
A catalyst increases the rate of a chemical reaction.
🔼H for catalyzed and uncatalyzed reactions is the same.
Catalysts may be classified as homogeneous and heterogeneous.
If two substances in the same phase are miscible
They are completely soluble in each other.
The number of molecules evaporating and condensing are equal
When a liquid in a closed container reaches a state of equilibrium with its vapor.
The total heat absorbed or released when one substance dissolves in another.
When a solution reaches a state of equilibrium, why does the amount of undissolved solid remain constant
The rate of crystallization equals the rate of dissolution.
What do colligative properties primarily depend on?
Concentration of the solution
In a solution of glucose in water, what is the glucose?
How does increasing concentration usually affect the rate of a reaction?
It increases the rate of reaction by increasing the frequency of collisions
A homogeneous mixture of two or more substances
A protein catalyst found in living things
A substance that slows the rate of a reaction.
A series of steps describing the way in which a chemical reaction proceeds
A chemical reaction in which the products of one reaction step cause other reactions to occur
A reaction in a proposed series that has a greater activation energy than the others and thus occurs more slowly.
The erratic movement of colloidal particles due to random molecular collisions that keep them suspended
Substances that dissolve in water to produce ions that can conduct an electrical current
The minimum kinetic energy that a molecule must possess to undergo a chemical reaction
Tiny, emulsified droplets of grease or oil suspended in water by soap molecules
A solution that contains as much dissolved solute as possible under equilibrium
When two opposites process continuously occur at equal rates so that they offset each other
An ion or molecule surrounded by water molecules in aqueous solution
The quantity of a solute for a given quantity of solution or solvent
In a chemical reaction, the change in concentration of a substance divided by the time for the change
Why does a catalyst increase the rate of reaction
It reduces activation energy
"Like dissolves like"
Substances with similar intermolecular forces will dissolve in each other more readily
At 20°C the rate of a particular reaction is 0.0001M/s; what is the rate expected to be at 60°C, assuming all other factors remain the same?
Two compartments are separated by a semipermeable membrane. What happens if one compartment is filled with honey and one with distilled water
There is a net flow of water from the distilled water compartment to the honey compartment
A platinum mesh used to break down petroleum vapors into smaller molecules
Water and isopropyl alcohol
A completely miscible combination
A substance you would expect to be most soluble in a non polar solvent such as gasoline
Aerogel, milk, smoke
Rate-determining steps of a reaction
Reaction can proceed no faster than the rate-determining step.
Rate-determining step is the slowest step of a multi step reaction.
The rate-determining step should be the focus of any attempt to increase the reaction rate.
Solution that contains more solute than is ordinarily possible under equilibrium conditions
Substance that increases the rate of a chemical reaction without being consumed in the reaction
Adding a nonvolatile solute to a liquid tends to raise or lower its boiling point
When a solid is dissolved in a liquid solvent does increasing the temperature tend to increase or decrease the solubility
When a gas is dissolved in a liquid solvent does increasing the temperature tend to increase or to decrease the solubility of the gas
Activated complex (or transition state)
Short lived unstable arrangement of atoms that molecules are thought to form as they collide and chemically react.
Does increasing the temperature of a liquid tend to increase or decrease its vapor pressure
Does adding a nonvolatile solute to a liquid tend to increase or to decrease its vapor pressure
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