Module 13
What is the definition of a heterogeneous mixture?
A mixture in which the particles are evenly distributed or blended throughout
What is the law of conservation of energy?
Energy cannot be created or destroyed, only changed
What is collision theory?
a chemical reaction to occur, reacting particles must collide with one another
What is the definition of equilibrium?
the state in which opposing forces are balanced
Are acids proton donors or acceptors?
donor
What effect does increasing temperature have on dissolving liquids?
Dissolving happens faster
In an exothermic reaction, is ΔH positive or negative?
negative
What does an inhibitor do to a reaction?
Slows it down
What is the definition of a reversible reaction?
a chemical reaction that proceeds in both the forward and reverse directions
If the PH < 7 is the substance acidic, basic, or neutral?
acid
What is the formula for finding the percent by mass of a solution?
(mass of solute/mass of solution) x 100
What is the definition of specific heat?
he amount of heat required to raise the temperature of one gram of a substance by one degree celsius
what does increasing the surface area of reactants do the the rate of a reaction?
increases the rate of reaction
What do brackets in an equilibrium expression represent?
concentration
what does the strength of an acid/base refer to?
How much it ionizes in water
Why do smaller particles dissolve faster?
More surface area is exposed to the solvent
What is the equation for calculating heat?
Q = m x c x ΔT
What is the definition of activation energy?
the minimum amount of energy required to start a reaction
According to Le Chatelier’s Principle, would adding reactants shift a reaction right or left?
right
What are the standard products of a neutralization reaction?
salt and water
What is the exception that exists in regards to solubility when temperature is increased?
Gases become less soluble in liquids
What is the molar empalthy(heat) of fusion, ΔHfus?
The amount of energy needed to melt one mole of a solid
What is an activated complex?
unstable peak of a chemical reaction
What does it mean if keq > 1 ?
products are favored at equilibrium/more products than reactants
What is the limitation to the arrhenius model?
while acids always contain H+, some bases don’t contain OH-