Vocabulary
The part of the Galvonic/Voltaic cell that loses mass and the location of oxidation.
What is the Anode?
what is the conjugate base in this reaction NH3 (aq)+ H2O (l) --> NH4+(aq) + OH - (aq)
OH-
I am present everywhere, but not in my pure form, what am I?
What is O2/Oxygen?
List the different intermolecular forces based on increasing strength and describe each:
Correct order: Ion-Dipole interactions > Hydrogen bond > Dipole-Dipole interactions > London dispersion forces. Hydrogen bonds are when there is a formation of an bond between two molecules between H and Nitrogen, oxygen, or Flourine. Dipole-dipole interactions are intermolecular attractions between the positive end of one polar molecule and the negative end of another polar molecule. London-dispersion forces are interactions between two-molecules are that are non-polar. Finally Ion-dipole interactions are a type of intermolecular force that occurs between a charged ion and a polar molecule (dipole)
What does the reaction rate say about the reaction and how can a reaction be sped up?
The reaction rate informs a chemist how quickly a reaction is proceeding, which provides insight into its mechanism and the efficiency of the reaction overall. Some factors such as increasing temperature, the concentration of either the products or reactants, increasing the surface area and adding a catalyst are all things that speed up a reaction.
An element/atom that loses an electron becomes a
A cation
What is the defintion of a Bronsted-Lowry Base and give an example?
The definition of a Bronsted-lowry base is defined as a proton acceptor. An example could be anything such as NH3,.....
I am a strong acid that fully disassociates and ionizes and I my shared bond is with a group 17 Halogen.
What is HCl, HBr, or HI?
The factors that influence IMFS are....
What is Boiling/Melting point, Viscosity, surface tension, and capillary action?
What is the relative rate for the following equation: 2O3 (g) --> 3O2 (g). Make sure to pay attention to signs of the reactants and the sign of the product.
What is Rate= -1/2 Δ[O3]/Δt = 1/3 Δ[O2]/Δt
A ogrnaic compound/molecule that is formed by the reaction of a Carboxylic acid and an Alcohol.
What is an ester?
How many milliliters of 5.0 M copper(II) sulfate solution must be added to 160 mL of water to achieve a 0.30 M copper(II) sulfate solution?
what is 10mL?
What is the Oxidation number for the Chronimium in Cr2O7-2
+6
Under which conditions of temperature and pressure will H2 gas be expected to behave most like an ideal gas? In general what is the ideal conditions for an ideal-gas.
Under high temperature and low pressure, a gas will be most ideal. Think of a summer day, you want the temperature to be high for you to tan and you want as little pressure from your parents as possible.
What is the rate expression for the following reaction? What is the value of the rate constant for the reaction?
H2O2 + 2HI --> 2H2O + I2
Trial [H2O2] [HI] Rate
1 0.1 M 0.1 M 0.0076mol/L/s
2 0.1 M 0.2 M 0.0152 mol/L/s
3 0.2 M 0.1 M 0.0152 mol/L/s
The rate law expression is rate =k[HI][H2O2]
and then to find k plug in one of the trials concentrations for both reactants and the rate. You can do 0.0076 M/S = k[0.1M][0.1M], then you will get that k= 0.8 1/M.S.
The volume of a given sample of gas at constant temperature varies inversely with the pressure
What is Boyle's Law?
What formula is used to calculate the pH of a buffer solution when you know the pka and have known concentrations of the base, acid, and salt.
What is the Henderson hasselbalch equation pH = pKₐ + log([A⁻]/[HA])?
What is the formula to use when you have your standard Ecell and number of electrons but want to find your Gibbs free energy?
what is ΔG= -nFE
Equal masses of He and Ne are placed in a sealed container. What is the partial pressure of He if the total pressure in the container is 6 atm?
The partial pressure is 5 atm
What is the half-life of a radioactive isotope if a 500.0g sample decays to 62.5g in 24.3 hours?
What is 8.1 hours? to solve you would do the first half-life would make the sample 250 g, the second would then be 125g and then the third half-life would be 62.5 meaning that there were three half-lives in 24.3 hours so now do 24.3/3 and you get 8.1 hours.
For a mixture of gases in a container, the total pressure exerted is the sum of the pressures that each gas would exert if it were alone
What is Dalton's law of partial pressures?
Your are given the following information, you have 0.20 M of CH3COOH (aq), Your Ka= 1.8 x 10-5 at 25 C, calculate the pH and Percent Ionization using the following equation: CH3COOH (aq) + H2O (l) ⇌ H3O+ (aq) + CH3COO- (aq). Make sure to make an ice table and use the right equation to find the percent ionization.
Balance the redox equation in an acidic solution H2O2 + Cr2O7-2 --> O2 + Cr+3
8H+ + 3H2O2 + Cr2O7-2 --> 3O2 + 2Cr+3 + 7H2O
Which of the following compounds has stronger London dispersion forces based on their molecular structure and explain why?
A. CH4 (methane)
B. C6H14 (hexane)
The correct answer choice is hexane because London dispersion forces typically rely on the polarizability of a molecule's electron cloud and so a bigger molecule or compound that has more elements to it has a more polarizable electron cloud because of the presence of more electrons essentially.
The proposed mechanism for a given chemical reaction is shown below. Step 1: A + B ⇆ F (fast)
Step 2: F+ A → C + G (slow)
Step 3: G + A ⇆ C + D (fast)
Which is the correct rate law?
a. rate = k [A]2 [B]
b. rate = k [A] [B] [F] [G]
c. rate = k [A] [B]
d. rate = k [A]3 [B]
e. rate = k [A]2 [B] [F]
The correct answer is choice A meaning is it the correct rate law.