Kinetics 1
What are the units for second order reactions?
M^-1s^-1 (if it helps think of adding the powers together 1+1 in this case to get the units. Only one you need to memorize is that zero is Ms^-1).
What is the order in respect to A and B?
rate = k[B]^2
B is second order and A is zero order.
Given the equation: 2NO(g) + O2 <- -> 2NO2 (g) what direction does the equation go in when a small amount of NO(g) is removed?
Reactants
What is the definition for Bronsted-Lowry Acids?
Proton donor
What is a Lewis acid?
Electron (lone pair) acceptor
What effect does a catalyst have on the rate of a reaction?
It lowers the energy of the reaction, but it does not affect the rate.
Is the reaction rate of a reactant equal to the reaction rate of another reactant or of the product? Explain why or why not or when not?
Not always because the reaction rate for the reactant is negative and the reaction rate for the product is positive.
How would you increase the yield of product in the following reaction?
SO2(g) + NO2(g) ---> SO3(g) + NO(g) = −42 kJ
(b) decrease temperature
Which compound is the conjugate base?
HCO3- + HCl ==> H2CO3 + Cl
Cl-
What will be the pOH, if [HCl] is 0.100 M?
13.00
Calculate half-life for first-order reaction if 68% of a substance is reacted within 66 s.
40 s.
H2O2(l) → 2H2O(l) + O2(g). The decomposition of H2O2 to water and oxygen follows first order kinetics with a rate constant of 0.0410 min-1. Calculate the [H2O2] after 10 minutes if [H2O2] is 0.200 M.
In the reaction 2 NO2(g) -> N2O4(g) the initial concentration of N2O4 was 0.100 M. At equilibrium, the concentration of N2O4 was measured as 0.009 M. Find Kc.
0.27
Which is the strongest acid? HClO, HClO2, HClO3, or HClO4
HClO4
Identify the Lewis acid and the Lewis base in the following reaction.
Lewis acid is AlCl3 and base is Cl-
What is the value of the rate constant for a second order reaction if the reactant concentration drops from 0.657 M to 0.0981 M in 17.0 s ? Include appropriate units.
0.510 1/Ms
Find the order for [A] and [B] given the equation and the tabulated data.
A + B → Products.
Trial | [A] (M) | [B] (M) | Rate (M/min)
1 0.0500 0.0500 0.000140
2 0.1000 0.0500 0.000140
3 0.1000 0.1000 0.000560
Rate = [B]^2
0.035 moles of SO2, 0.500 moles of SO2Cl2, and 0.080 moles of Cl2 are combined in an evacuated 5.00 L flask and heated to 100oC. What is Q before the reaction begins? Which direction will the reaction proceed in order to establish equilibrium?
Products
Determine the ion concentrations of a 0.50 M solution of NH3. The Kb is 1.8x10-5.
[NH4+] = 3.0x10-3 M and [OH-] = 3.0x10-3 M
Order the strength of the acids: HI, HCl, HF, and HBr
HI > HBr > HCl > HF
The rate constant for a second order reaction is 0.13 M-1s-1. If the initial concentration of reactant is 0.26 mol/L, how long will it take for the concentration to decrease to 0.13 mol/L?
30 seconds
A proposed mechanism for the reduction of nitrogen as NO by hydrogen is:
rate = k[H2][NO]^2
In the following reaction, Kp = 9.3x10-7 at room temperature. Calculate the equilibrium concentration of N2O4 in a flask initially containing only 3.00 atm of NO2.
2NO2(g) -> N2O4(g)
8.4x10^-6
Which is the weakest acid? HCOOH, ClCH2COOH, Cl2CHCOOH, or Cl3CHCOOH
HCOOH
Identify the Lewis acids and bases in the equation: (CH3)3N + BF3 ⇄ (CH3)3NBF3
Lewis acid is BF3 and Lewis base is (CH3)3N