Chemical Reactions
Fill in the blank: The rate of a chemical reaction is equal to the change in _______ divided by the change in _____.
concentration (of a product or reactant), time
If you placed a red blood cell in a _____ solution, you would expect it to shrink.
(Isotonic, Hypertonic, Hypotonic)
Hypertonic
If you move a gas originally at a pressure of .5 atm from a 2 L container to a 4 L container, what is the final pressure?
.25 atm
Name the three conditions that must be satisfied in order for a chemical reaction to occur.
Collision, orientation, energy
Which of the following compounds would have the greatest effect on boiling point? Why?
AlCl3, MgCl2, NaCl, glucose
AlCl3, because it dissociates into 4 particles, which is the most of the options
MgCl2 - 3 particles
NaCl - 2 particles
glucose - 1 particle (does not dissociate)
If you take 5 L of gas at 25 degrees Celcius and freeze it to -5 degrees Celcius, what is the final volume of the gas?
4.5 L
Name 2 of the three factors that could speed up a chemical reaction.
Temperature, concentration, catalysts
Water can dissolve 16 g of sugar at 34 degrees Celsius. If, at 34 degrees Celsius, you add 25 grams of sugar and some sinks to the bottom of your water/sugar solution, is the solution saturated, unsaturated, or supersaturated?
Saturated
What is the volume of an ideal gas at STP?
22.4 L
For an endothermic reaction, you would expect that the final energy of the products is _____ than the initial energy of the reactants.
greater
Given a double replacement reaction with reactants LiOH and MgBr2, write the complete and net ionic equations.
Complete: 2LiOH (aq) + MgBr2 (aq) -> 2LiBr (aq) + Mg(OH)2 (s)
Net ionic: 2OH- (aq) + Mg2+ (aq) -> Mg(OH)2 (s)
If the total atmospheric pressure is 1.02 atm, and you have measured .34 atm of nitrogen and .04 atm of hydrogen, and all the remaining gas is oxygen, what is the partial pressure of oxygen?
.64 atm
Describe how a catalyst works.
Lowers the activation energy of a reaction.
If you have .300 M sugar (C6H12O6) dissolved in 200. mL of water, how many grams of sugar do you have?
10.8 g sugar
If you begin with 8 moles of gas at a temperature of 181 K and a pressure of 1.3 atm, what is the volume of the gas?
91.4 L