239 prompts matching "Concentrating an ore before extraction"
Practice set: Assigning oxidation numbers in compounds and in ions
Act as my SS2 Chemistry tutor. Give me five practice questions on assigning oxidation numb
Spot my mistake: Assigning an oxidation number without checking the overall charge
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Calculation practice: Working out the change in oxidation number
Act as my SS2 Chemistry tutor. Walk me through working out the change in oxidation number
Explain back: Why oxidation and reduction always occur together
I have just studied why oxidation and reduction always occur together in my SS2 Chemistry
Practice set: Balancing a redox equation by half-equations
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Exam practice: The common oxidising and reducing agents and their tests
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Spot my mistake: Calling the oxidising agent the substance that is oxidised
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Calculation practice: Balancing a redox equation in acidic solution
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Chemistry at work: Redox reactions in batteries and cells
Act as my SS2 Chemistry tutor. Explain which Nigerian jobs and industries depend on redox
Explain back: Why metals conduct heat and electricity
I have just studied why metals conduct heat and electricity in my SS2 Chemistry class. Let
Practice set: Density, melting point and hardness across the metals
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Exam practice: The reactivity series and how it is established
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Spot my mistake: Assuming every metal is hard and dense
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Explain back: Extraction by reduction with carbon
I have just studied extraction by reduction with carbon in my SS2 Chemistry class. Let me
Practice set: The chemical behaviour of metals and non-metals compared
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Chemistry at work: Metalloids, and where they sit between the two
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Explain back: The preparation and properties of chlorine
I have just studied the preparation and properties of chlorine in my SS2 Chemistry class.
Practice set: Making sulphur dioxide in the laboratory and testing it
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Practice set: The electrolysis of brine and the products it gives
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Exam practice: The electrolysis of molten and of aqueous compounds compared
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