● Atoms of different elements combine in fixed ratios to form compounds, which have different
properties from their component elements. Guidance Names and symbols of the elements are in the IB data booklet in Section 5. ● Mixtures contain more than one element and/or compound that are not chemically bonded together and so retain their individual properties. ● Mixtures are either homogeneous or heterogeneous. |
● Deduction of chemical equations when reactants and products are specified.
Guidance Balancing of equations should include a variety of types of reactions. ● Application of the state symbols (s), (l), (g), and (aq) in equations. ● Explanation of observable changes in physical properties and temperature during changes of state. Guidance ● Names of the changes of state – melting, freezing, vaporization (evaporation and boiling), condensation, sublimation and deposition – should be covered. ● The term ‘latent heat’ is not required. |
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Inquiry questions |
How are chemical equations deduced and balanced?
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What is the definition of elements, compounds, and mixtures?
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Producing and Balancing SYMBOL equations |
Balancing equation demo
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Please note that the equations below may be unbalanced
Synthesis: (Oxidation of Magnesium) Mg + O2 -> MgO Decomposition: (Elephant toothpaste) H2O2 -> H2O + O2 Double replacement: (Precipitation reaction) Pb(NO3)2 + KI -> PbI2 + KNO3 Combustion: (Whoosh bottle) C2H5OH + O2 -> H2O + CO2 TASK: Balance the equations above |
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Balancing equations
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Task:
Understand how to balance symbol equations and learn what not to do. This video takes you through the process and completes several examples to deepen your understanding. Ensure that you are work through the examples in video on your own as you watch. |
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Atom economy
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This video explains atom economy using organic substances by working through set problems.
Ensure that you work through the problems on your own as you watch the video and pause the video when it asks you to do so. |
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Fire and Flame Uni Lecture |
Task1:
- Watch the videos
- Take notes of the reactions and balanced equations
- Find images of reactions, as well as the balanced equation
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PhET Simulation: Balancing Chemical Equations |
Task:
1. Complete the introduction and balance all 3 reactions
2. Play a game
1. Complete the introduction and balance all 3 reactions
2. Play a game
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Balancing equations |
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States of Matter and Diffusion |
Energy changes between states of matter
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This video is reminding you of the states of matter and the energy changes involved in the state changes. It also explains what states substances are at room temperature and why, which is key to identify states symbols for reactants and products in symbol equations.
TASK 1: Identify the state symbols in the following equations: CH4 + 2O2 -> CO2 + 2H2O (remember here that this is a combustion equation and the CO2 and H2O are not at room temperature) TASK 2: Explain what is happening during the following parts of the graph. Ensure that you use the concept of kinetic energy and breaking of inter-particle forces in your explanation. 1) From A to B 2) From B to C 3) From C to D 4) From D to E 5) From E to F Answer: You can find the answer in the Pearson DP Chemistry text book on page 13
Blog task:
Click on the Blog button below and write a comment about the difference between boiling and evaporation. If you are unsure , please watch the video again. In addition, read at least one of your classmates comments and respond to your classmate what he or she explained well and what he or she could explain better. |
homogenous and heterogenous mixtures
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only needed to watch until 3:50min.
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This video discusses the different types of homogenous and heterogenous mixtures.
Task:
Take notes in the diagram of all the different types of mixtures |
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States of matter in cooking - Sugar |
This video is linking to the theme of Unit 3 which is all about cooking.
