Reactions & Redox

• Chemistry · Reactions & Redox Balancing redox equations – the electron balance method Step by step: assign oxidation numbers to each element, find which ones gain or lose electrons, write the oxidation and reduction... Ages 15–16
• Chemistry · Reactions & Redox Metals in salt solutions – predicting reactions from standard electrode potentials Dip a strip of Mg, Zn, Fe, Cu or Ag into CuSO₄, AgNO₃, FeSO₄ or ZnSO₄ solution. Students predict whether a reaction takes place from the... Ages 17–18
• Chemistry · Reactions & Redox 2H₂ + O₂ → 2H₂O – sparking a hydrogen explosion A mixture of H₂ and O₂ gas in a flask does not react at room temperature. Click Ignite (or tap the flask): the spark supplies energy,... Ages 13–14
• Chemistry · Reactions & Redox Oxidation Numbers – Practice with the Rules Choose a compound or ion (KMnO₄, H₂SO₄, NH₄⁺, Fe₃O₄, K₂Cr₂O₇, H₂O₂, NaH, SO₄²⁻…), enter the oxidation number of each element and check:... Ages 15–16

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