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Relative Atomic Mass and Mr
This lesson recaps chemical formula, Ar and Mr as well as using these in reacting masses (without the mole) and percentage composition.
Suitable for GCSE, IGCSE and year 12 students.
Using a Colourimeter
This lesson introduces using a colourimeter and the principle of Beer’s Law (includes link to Phet simulation).
The main task is for students to create their own calibration curve for copper sulphate solution and use this to determine the concentration of a unknown solution of CuSO4.
Introduction to Acids & Bases
This lesson introduces acids and bases, starting with an activity to guide students through how ideas of acids and bases have changed over time (NOS for IB curriculum). The lesson links GCSE knowledge to defining them as Bronsted-Lowry acids and bases.
Reactivity 3.1.1 Acid Base Theory (Bronsted-Lowry)
Presentation aimed as a starting lesson for introducing acid-base theory for KS4 or KS5. The lesson defines acids, bases and alkalis and includes a student task to develop a timeline on changes in acid-base theory from selected literature.
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Empirical Formula
This presentation works through how to determine empirical formula from percentage composition or mass, determining molecular formula from empirical formula and Mr.
It also includes student practical sheet to determine empirical formula of magnesium oxide with a focus on error and uncertainty in processing answers.
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HL Acid/Base Calculations
This presentation works through with examples and questions a series of problems linked to determining pH, Ka, pKa, Kb, and pOH for students at higher level (IB), but would be suitable for A Level students.
Solutions and answers are in the notes section of the presentation.
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Reactivity 3.1 Proton Transfer Reactions
This is a complete bundle of resources including presentations, student work sheets and students practical sheets to meet the new IB Reactivity 3.1 syllabus. Calculations in presentations and worksheets have worked answers provided.
The resources here may also be appropriate for other exam boards and includes the following sequence of lessons:
Development of acid/base theory
Reactions of acids and bases
Conjugates
pH scale and pH calculations
Using the ionic product of water (Kw)
Strong and weak acids
pH curves (SL & HL)
pOH scale and calculations
Using Ka, pKa, Kb and pKb
pH of salt solutions
Indicators
Buffers (including calculations)
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Reactivity 3.1.2 & 3.1.3 Conjugate Acids and Bases
This lesson combines Reactivity 3.1.2 and 3.1.3 to deduce formula of conjugate species and recognise them in equations for various reactions.
The lesson also includes link to Wordwall task to match up conjugate pairs.
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Reactivity 3.1.4 pH Scale & Calculating pH
Complete lesson which explains the history of the pH scale, quick student practical comparing the use of Universal Indicator with a pH meter as well as worked examples for calculations.
Student practise questions with answers are provided in the slides.
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Reactivity 3.1.5 Using Kw (Ionic Produce of Water)
This complete lesson includes worked examples and a student practise sheet of calculations related to this lesson and R3.1.4 pH calculations.
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Reactivity 3.1.12 pH of Salt Solutions
This lesson looks at salt hydrolysis and how to predict the pH of salt solutions. Presentation includes link to Wordwall task.
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Reactivity 3.1.6 Strong and Weak Acids
This lesson includes the presentation and student practical sheet to run through the various methods for determining if an acid is strong or weak. The document includes past paper questions with their mark schemes.
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Reactivity 3.1.9 pOH Scale & Calculations
This complete lesson includes a presentation and student calculation worksheet with worked answers on the second page for using the pOH scale (HL).
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Reactivity 3.1.8 pH Curves (Strong acids and bases)
This presentation and student practical sheet run through the basics of pH curves for strong monoprotic acids and bases. The student worksheet contains questions with worked answers attached at the end.
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Strong Acid/Base Calculations
This resource was designed for teaching IB Standard Level acid/base calculations but is suitable for any courses that require students to calculate pH for strong acid/bases and use Kw.
Answers to problems can be found in the notes.
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Calculating Moles & Molar Gas Volume
This lesson and includes teaching activities to guide students through the mole concept, including applying the molar volume of a gas and the Avogadro constant. Starting activity estimating grains of sand on a beach provides a great opportunity to discuss the magnitude of the Avogadro constant. A nice visual way to relate this in class is to have 1 mol of charcoal powder or NaCl measured out for students to see.
Some IB MCQ questions and answers also provided on the final slides as examples.
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Activation Energy of UV Beads
This presentation and student practical sheet introduces the Arrhenius Equation and how it can be modified to determine activation energy (Ea) for a simple experiment using UV beads.
The advantage of this task is it is far more straightforward for students to complete compared to more complex class practicals such as the reaction between bromate and bromide ions or the iodine clock reaction. There is also much less prep and tidying!
This activity includes a spreadsheet of sample data and calculation which can be shared with students.
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Rates of Reaction - Using a Colourimeter
This presentation and assessed student practical sheet guide students through the use of colourimeters and application of Beer’s law to determine the rate of reaction between sodium thiosulphate and hydrochloric acid.
Mark scheme included.
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The Mole - Calculating Concentration
This lesson introduces students into how to apply the mole concept to solutions and solve a range of problems (answers included).
The final slide leads onto the next planned lesson which is to create a stock solution of sodium hydroxide.
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Empirical Formula - Water of Crystallisation
This lesson pack would be suitable over a 2-3 series and guides students through the preparation of Epsom salt (magnesium sulphate) and analysis to determine its water of crystallisation.
This pack includes presentation, student practical sheet plus practical assessment paper with mark scheme included.