Answers to 2017 Chemistry Exam Review Compounds and
... (Notice that water is also amphoteric – acting as a base in the first example and an acid in the second.) 59. Kw = [H3O+][OH-] = 1.0 x 10-14 This is a very small number, meaning water rarely selfionizes. 60. [H+] = 1.0 x 10-14 / [OH-] or [OH-] = 1.0 x 10-14 / [H+] 61. pH = the negative power of ten ...
... (Notice that water is also amphoteric – acting as a base in the first example and an acid in the second.) 59. Kw = [H3O+][OH-] = 1.0 x 10-14 This is a very small number, meaning water rarely selfionizes. 60. [H+] = 1.0 x 10-14 / [OH-] or [OH-] = 1.0 x 10-14 / [H+] 61. pH = the negative power of ten ...
Introduction to the Chemistry of Life
... by a system when a process occurs at constant pressure, as in biological systems, and no work is done other than the work of expansion or contraction (∆V) of the system. Entropy is a measure of the heat absorbed or generated by a system at constant temperature and reflects the number of equivalent w ...
... by a system when a process occurs at constant pressure, as in biological systems, and no work is done other than the work of expansion or contraction (∆V) of the system. Entropy is a measure of the heat absorbed or generated by a system at constant temperature and reflects the number of equivalent w ...
Acids and Bases - hrsbstaff.ednet.ns.ca
... Finding [OH-] in Acids and [H+] in Bases Remember Kw from the previous section? Now we learn why it is important. When we need to determine ion concentrations of an acid, you should immediately realize you will be finding the concentration of hydrogen ion (H+) and some anion (Cl- and C2H3O2- in our ...
... Finding [OH-] in Acids and [H+] in Bases Remember Kw from the previous section? Now we learn why it is important. When we need to determine ion concentrations of an acid, you should immediately realize you will be finding the concentration of hydrogen ion (H+) and some anion (Cl- and C2H3O2- in our ...
First, there are several issues regarding this course need to be
... In order to apply the Born equation (10.2), we need to know the radius of the corresponding ions. These numbers can be obtained from Table 23.3 r(Br-) = 196 pm; r(Cl-) = 181 pm; thus ∆solvGө(Br-, aq) - ∆solvGө (Cl-, aq) = - (1/196 – 1/181)*6.86*104 kJ mol-1 = 29.00 kJ mol-1 (The calculated result is ...
... In order to apply the Born equation (10.2), we need to know the radius of the corresponding ions. These numbers can be obtained from Table 23.3 r(Br-) = 196 pm; r(Cl-) = 181 pm; thus ∆solvGө(Br-, aq) - ∆solvGө (Cl-, aq) = - (1/196 – 1/181)*6.86*104 kJ mol-1 = 29.00 kJ mol-1 (The calculated result is ...
Mock Final Exam
... b. The rate of the forward reaction equals the rate of the reverse reaction. c. The rate constants of the forward and reverse reaction are equal. d. Both rates of reaction and rate constants of the forward and reverse reactions are equal. e. None of the above. 11.2: Equilibrium constant 92. Write th ...
... b. The rate of the forward reaction equals the rate of the reverse reaction. c. The rate constants of the forward and reverse reaction are equal. d. Both rates of reaction and rate constants of the forward and reverse reactions are equal. e. None of the above. 11.2: Equilibrium constant 92. Write th ...
AS Paper 1 Practice Paper 12 - A
... Write an expression for the equilibrium constant, Kc, for this reaction. Calculate the value of this constant at temperature T and give its units. Expression for Kc .......................................................................................... ...
... Write an expression for the equilibrium constant, Kc, for this reaction. Calculate the value of this constant at temperature T and give its units. Expression for Kc .......................................................................................... ...
Class notes
... Environmental systems are often open systems, i.e. material is being added or removed, and/or material is reacted If a homogeneous system contains a number of different substances its internal energy may be considered to be a function of the entropy, the volume and the change in the # moles ...
... Environmental systems are often open systems, i.e. material is being added or removed, and/or material is reacted If a homogeneous system contains a number of different substances its internal energy may be considered to be a function of the entropy, the volume and the change in the # moles ...
Chemical equilibrium, redox and pE
... of energy and entropy change • Reactions proceed in direction that minimises the internal energy, i.e. H is lowered • Reactions proceed to maximise degrees of freedom i.e. entropy increases • ∆G is negative for a spontaneous reaction ...
... of energy and entropy change • Reactions proceed in direction that minimises the internal energy, i.e. H is lowered • Reactions proceed to maximise degrees of freedom i.e. entropy increases • ∆G is negative for a spontaneous reaction ...
7.1 Equilibrium PPT equilibrium1
... What effect will removing NH3 have on the equilibrium? System will shift to make more NH3 so it will temporarily speed up to the right. Some N2 & H2 will react to produce more NH3. At the new equilibrium there will be less N2, less H2, and less NH3 than the original equilibrium. The value of Kc rema ...
... What effect will removing NH3 have on the equilibrium? System will shift to make more NH3 so it will temporarily speed up to the right. Some N2 & H2 will react to produce more NH3. At the new equilibrium there will be less N2, less H2, and less NH3 than the original equilibrium. The value of Kc rema ...
Equilibrium chemistry
Equilibrium chemistry is a concerned with systems in chemical equilibrium. The unifying principle is that the free energy of a system at equilibrium is the minimum possible, so that the slope of the free energy with respect to the reaction coordinate is zero. This principle, applied to mixtures at equilibrium provides a definition of an equilibrium constant. Applications include acid-base, host-guest, metal-complex, solubility, partition, chromatography and redox equilibria.