LESSON OBJECTIVE: Understand pH changes in acid-base titrations and how to select an appropriate indicator for certain reactions. Included are the lesson slides and student led tasks found in this lesson video: https://youtu.be/yYBdCIWzy7s Learning Outcomes: (taken from the Cambridge International AS and A Level Chemistry curriculum) 7.2 Brønsted-Lowry theory of acids and bases 9 sketch the pH titration curves of titrations using combinations of strong and weak acids with strong and weak alkalis 10 select suitable indicators for acid-alkali titrations, given appropriate data (pKa values will not be used) 25.1 Acids and bases 4 calculate [H+(aq)] and pH values for: a) strong acids b) strong alkalis c) weak acids

LESSON OBJECTIVE: Understand enthalpy changes that occur in ionic salts in solution. Included are the lesson slides and student led tasks found in this lesson video: https://youtu.be/hpLvqie4k4M Learning Outcomes: (taken from the Cambridge International AS and A Level Chemistry curriculum) 23.2 Enthalpies of solution and hydration 1 define and use the term enthalpy change with reference to hydration, ΔHhyd, and solution, ΔHsol 2 construct and use an energy cycle involving enthalpy change of solution, lattice energy and enthalpy change of hydration 3 carry out calculations involving the energy cycles in 23.2.2 4 explain, in qualitative terms, the effect of ionic charge and of ionic radius on the numerical magnitude of an enthalpy change of hydration

LESSON OBJECTIVE: Investigate electrolysis and predict products from the electrolysis of both molten and aqueous compounds Included are the lesson slides and student led tasks found in this lesson video: https://youtu.be/S4rc8qc2S7o Learning Outcomes: (taken from the Cambridge International AS and A Level Chemistry curriculum) 24.1 Electrolysis 1 predict the identities of substances liberated during electrolysis from the state of electrolyte (molten or aqueous), position in the redox series (electrode potential) and concentration

LESSON OBJECTIVE: Investigate pH, Kw, Ka, pKa and how to utilise them in calculations. Included are the lesson slides and student led tasks found in this lesson video: https://youtu.be/Zacy1Elwpd4 Learning Outcomes: (taken from the Cambridge International AS and A Level Chemistry curriculum) 25.1 Acids and bases 1 understand and use the terms conjugate acid and conjugate base 2 define conjugate acid-base pairs, identifying such pairs in reactions 3 define mathematically the terms pH, Ka pKa and Kw and use them in calculations (Kb and the equation Kw = Ka × Kb will not be tested)

LESSON OBJECTIVE: Understand the concept of electron affinity and use Born-Haber cycles to calculate lattice energies Included are the lesson slides and student led tasks found in this lesson video: https://youtu.be/GC49rKLtHqk Learning Outcomes: (taken from the Cambridge International AS and A Level Chemistry curriculum) 23.1 Lattice energy and Born-Haber cycles define and use the terms: a) enthalpy change of atomisation, ΔHat b) lattice energy, ΔHlatt (the change from gas phase ions to solid lattice) a) define and use the term first electron affinity, EA b) explain the factors affecting the electron affinities of elements c) describe and explain the trends in the electron affinities of the Group 16 and Group 17 elements construct and use Born–Haber cycles for ionic solids (limited to +1 and +2 cations, –1 and –2 anions) carry out calculations involving Born–Haber cycles explain, in qualitative terms, the effect of ionic charge and of ionic radius on the numerical magnitude of a lattice energy

LESSON OBJECTIVE: Describe how buffer solutions regulate pH, calculate buffer solution pH and investigate their applications. Included are the lesson slides and student led tasks found in this lesson video: https://youtu.be/ZxK5DferTAM Learning Outcomes: (taken from the Cambridge International AS and A Level Chemistry curriculum) 25.1 Acids and bases 5 a) define a buffer solution b) explain how a buffer solution can be made c) explain how buffer solutions control pH; use chemical equations in these explanations d) describe and explain the use of buffer solutions, including the role of HCO3- in controlling pH in blood 6 calculate the pH of buffer solutions, given appropriate data

LESSON OBJECTIVE: Understand the use of electrolysis quantitatively using changes in electrode mass. Included are the lesson slides and student led tasks found in this lesson video: https://youtu.be/LgJSJis8LwY Learning Outcomes: (taken from the Cambridge International AS and A Level Chemistry curriculum) 24.1 Electrolysis 2 state and apply the relationship F = Le between the Faraday constant, F, the Avogadro constant, L, and the charge on the electron, e 3 calculate: the quantity of charge passed during electrolysis, using Q = It the mass and/or volume of substance liberated during electrolysis 4 describe the determination of a value of the Avogadro constant by an electrolytic method

LESSON OBJECTIVE: Calculate standard cell potentials (E⦵cell) and use E⦵ values to determine the feasibility of a reaction Included are the lesson slides and student led tasks found in this lesson video: https://youtu.be/O2vAHv-Ur0I Learning Outcomes: (taken from the Cambridge International AS and A Level Chemistry curriculum) 24.2 Standard electrode potentials E⦵; standard cell potentials E⦵cell and the Nernst equation 4 calculate a standard cell potential by combining two standard electrode potentials 5 use standard cell potentials to: (a) deduce the polarity of each electrode and hence explain/deduce the direction of electron flow in the external circuit of a simple cell (b) predict the feasibility of a reaction

LESSON OBJECTIVE: Investigate reaction spontaneity by linking the concepts ΔG⦵ and E⦵cell Included are the lesson slides and student led tasks found in this lesson video: https://youtu.be/tb_nmdo0tCo Learning Outcomes: (taken from the Cambridge International AS and A Level Chemistry curriculum) 24.2 Standard electrode potentials E⦵; standard cell potentials E⦵cell and the Nernst equation 10 understand and use the equation ΔG⦵ = –nE⦵cellF

LESSON OBJECTIVE: Understand how to measure the standard electrode potentials of a half-cell relative to the standard hydrogen electrode. Included are the lesson slides and student led tasks found in this lesson video: https://youtu.be/4_nEOHscn-M Learning Outcomes: (taken from the Cambridge International AS and A Level Chemistry curriculum) 24.2 Standard electrode potentials E⦵; standard cell potentials E⦵cell and the Nernst equation 2 describe the standard hydrogen electrode 3 describe methods used to measure the standard electrode potentials of: (a) metals or non-metals in contact with their ions in aqueous solution (b) ions of the same element in different oxidation states

LESSON OBJECTIVE: Understand entropy as a measure of the disorder of a system. Included are the lesson slides and student led tasks found in this lesson video: https://youtu.be/CdkqC4mMPdw Learning Outcomes: (taken from the Cambridge International AS and A Level Chemistry curriculum) 23.3 Entropy change, ΔS define the term entropy, S, as the number of possible arrangements of the particles and their energy in a given system

LESSON OBJECTIVE: Investigate the relationship between concentration and cell potential both qualitatively and, using the Nernst equation, quantitatively Included are the lesson slides and student led tasks found in this lesson video: https://youtu.be/MetMKuOxGGc Learning Outcomes: (taken from the Cambridge International AS and A Level Chemistry curriculum) 24.2 Standard electrode potentials E⦵; standard cell potentials E⦵cell and the Nernst equation 6 deduce from E values the relative reactivity of elements, compounds and ions as oxidising agents or as reducing agents 7 construct redox equations using the relevant half-equations 8 predict qualitatively how the value of an electrode potential, E, varies with the concentration of the aqueous ions 9 use the Nernst equation, e.g. E = E⦵ + (0.059/z) log [oxidised species]/[reduced species] to predict quantitatively how the value of an electrode potential varies with the concentrations of the aqueous ions; examples include Cu2+(aq) + 2e- ⇌ Cu(s), Fe3+(aq) + e- ⇌ Fe2+(aq)

LESSON OBJECTIVE: Investigate the concept of electrode potential and describe galvanic cells. Included are the lesson slides and student led tasks found in this lesson video: https://youtu.be/p19qe7ZGVJI Learning Outcomes: (taken from the Cambridge International AS and A Level Chemistry curriculum) 24.2 Standard electrode potentials E⦵; standard cell potentials E⦵cell and the Nernst equation 1 define the terms: (a) standard electrode (reduction) potential (b) standard cell potential

LESSON OBJECTIVE: Understand and apply the concepts of solubility products, Ksp, the common ion effect and partition coefficients, Kpc, to a system at equilibrium Included are the lesson slides and student led tasks found in this lesson video: https://youtu.be/hCyVDahL1JA Learning Outcomes: (taken from the Cambridge International AS and A Level Chemistry curriculum) 25.1 Acids and bases 7 understand and use the term solubility product, Ksp 8 write an expression for Ksp 9 calculate Ksp from concentrations and vice versa 10 a) understand and use the common ion effect to explain the different solubility of a compound in a solution containing a common ion b) perform calculations using Ksp values and concentration of a common ion 25.2 Partition coefficients 1 state what is meant by the term partition coefficient, Kpc 2 calculate and use a partition coefficient for a system in which the solute is in the same physical state in the two solvents 3 understand the factors affecting the numerical value of a partition coefficient in terms of the polarities of the solute and the solvents used

In this lesson we discuss calculations with equilibrium constants using the ‘RICE table’ method and how equilibria can effect industrial chemical production, specifically in the Haber process and the Contact process. This is lesson twenty two in our physical chemistry series for Unit 7: Equilibria (from the Cambridge International AS Chemistry Curriculum (9701) 2019-2021 curriculum). Included are the lesson slides and student led tasks found in this lesson video: https://youtu.be/c8vIQiCz0vs LESSON OBJECTIVE: Apply the concepts of equilibria and equilibrium constants to laboratory procedures, including industrially with the Haber and Contact processes. LEARNING OUTCOMES (taken from the Cambridge International AS and A Level Chemistry (9701) 2019-2021 curriculum): 7.1 Chemical equilibria: reversible reactions, dynamic equilibrium f) calculate the quantities present at equilibrium, given appropriate data (such calculations will not require the solving of quadratic equations) g) describe and explain the conditions used in the Haber process and the Contact process, as examples of the importance of an understanding of chemical equilibrium in the chemical industry

In this lesson we discuss equilibrium constants and how to determine them using concentrations and partial pressures, and discuss how certain factors can change the value of an equilibrium constant. This is lesson twenty one in our physical chemistry series for Unit 7: Equilibria (from the Cambridge International AS Chemistry Curriculum (9701) 2019-2021 curriculum). Included are the lesson slides and student led tasks found in this lesson video: https://youtu.be/lNBnCDNfJ5w LESSON OBJECTIVE: Understand and calculate equilibrium constants (Kc and Kp), determine their units and interpret how certain factors can affect its value. LEARNING OUTCOMES (taken from the Cambridge International AS and A Level Chemistry (9701) 2019-2021 curriculum): c) state whether changes in temperature, concentration or pressure or the presence of a catalyst affect the value of the equilibrium constant for a reaction. d) deduce expressions for equilibrium constants in terms of concentrations, Kc , and partial pressures, Kp (treatment of the relationship between Kp and Kc is not required) e) calculate the values of equilibrium constants in terms of concentrations or partial pressures from appropriate data

In this lesson we discuss how intermolecular forces arise due to the concept of electronegativity and bond polarity and other bond properties. This is lesson ten in our physical chemistry series for Unit 3: Chemical Bonding (from the Cambridge International AS Chemistry Curriculum (9701) 2019-2021 curriculum). Included are the lesson slides and student led tasks found in this lesson video: https://youtu.be/CsH7LDX77fo LESSON OBJECTIVE: Understand the different intermolecular forces and their implications for a molecules physical properties. Explain these forces in terms of electronegativity and polarity. Learning Outcomes (from the Cambridge AS Chemistry Curriculum 2019-2021): 3.3 Intermolecular forces, electronegativity and bond properties. a) describe hydrogen bonding, using ammonia and water as simple examples of molecules containing N-H and O-H groups b) understand, in simple terms, the concept of electronegativity and apply it to explain the properties of molecules such as bond polarity, the dipole moments of molecules and the behaviour of oxides with water c) explain in terms of bond energy, bond length and bond polarity and use them to compare the reactivities of covalent bonds d) describe intermolecular forces (van der Waals’ forces) based on permanent and induced dipoles, as in, for example, CHCl3(l); Br2(l) and the liquid Group 18 element.