Why is a gas easier to compress than a liquid or a solid?
Volume of a gas's particles is small compared to the overall volume of the gas
Why does the pressure inside a container of gas increase if more gas is added to the container?
There is an increase in the number of collisions between particles and the walls of the container
If the volume of a container of gas is reduced what will happen to the pressure inside the container?
What happens to the pressure of a gas inside a container if the temperature of the gas decreases?
If 6 moles of a gas are added to a container that already holds 2 moles of gas, how will the pressure change inside the container?
the pressure will be 8 times greater
Why does air escape from a tire when the tire valve is opened?
the pressure outside the tire is lower than the pressure inside the tire
When the Kelvin temperature of an enclosed gas doubles, the particles of the gas
The volume of a gas is doubled while the temperature is held constant. How does the gas pressure change?
reduces by half
If a balloon full of air is cooled off, what happends to the volume of the air inside, if the pressure is constant?
Write the formula for the combined gas law.
P1 x V1/ T1 = P2 x V2/ T2
how does the surface tension of water compare with the surface tension of most other liquids?
it is higher
What causes water's low vapor pressure?
What is the shape of the water molecule? And why?
Surface tension is
the inward force which tends to minimize the surface area of a liquid
The fact that ice is less dense than water is related to the fact that
ice has a molecular structure that is an open framework held together by hydrogen bonds
Define solvent. -
The liquid in which a solute is dissolved to form a solution
Define salvation. -
solvent molecules surround solute ions
A solution is a mixture that
has the same properties throughout
Why are two nonpolar substances able to dissolve in each other?
they have similar attractive forces in their molecules
What type of compound is always an electrolyte?
Give examples of substances that are weak electrolytes in water : discuss types of compounds NOT the names of them like "salt", "sugar".
ionic compounds that partially dissociate in water
Which symbol is used to connect the formula of the compound with the number of water moles in a hydrate and write a formula example.
Which mixture type is characterized by the settling of particles?
Which mixture types exhibit the Tyndall effect and why?
suspensions and colloids
What three actions usually makes a substance dissolve faster in a solvent?
agitating the solution, increasing the temperature, decreasing particle size
What happens to the degree of solubility as temperature increases?
What happens to the solubility of a gas, in a liquid, if the partial pressure of the gas above the liquid decreases?
Describe the solvent and solute in a concentrated solution.
a large amount of solute
What is the morality of a solution that contains 9 moles of solute in 43 liters of solution? Use formula, show work here.
.21 M moles/ liters
What is the molarity of 0.50 L of solution in which 5.0 moles of sodium bromide is dissolved? Use formula, show work here
If the percent by volume is 4.0% and the volume of solution is 300 mL, what is the volume of solute in solution? Show formula and work here.
List the colligative properties of a solution.
boiling point elevation, vapor pressure lowering, freezing point depression
What happens to the energy produced by burning gasoline in a boat engine?
lose as heat in the exhaust, transformed into work to move the car, heats engine parts
What would likely happen if you were to touch the flask in which an endothermic reaction was occurring?
flask would probably feel cooler than before the reaction started
List as many forms of energy as you can think of. One is "light". Your turn
light, heat, electricity, etc
When energy is changed from one form to another
all of the energy can be accounted for
Why does a catalyst cause a reaction to proceed faster?
activation energy is lowered only
At equilibrium, what is the rate of production of reactants compared with the rate of production of products?
rates of reaction production and rate of product production are the same
When an acid reacts with a base, what compounds are formed?
acid plus base yields a: salt and water
List as many properties of acids as you can think of.
sour taste, strong or weak electrolyte
What are the properties of bases?
bitter taste, slippery, strong or weak electrolyte
Define the Arrhenius theory of acids and bases.
according to Arrhenius, a substance that ionizes to yield protons in aqueous solution is an acid
Which type of solution is one with a pH of: 8 __________, 2__________
ph 8 is a base, ph 2 is an acid / ph 7 is neutral
In a titration, when the number of moles of hydrogen ions equals the number of moles of hydroxide ions, what is said to have happened? It's an "e" word! No not elephant silly.
the equivalence point has been reached.