C: V₂O₃ , VO₂⁺ , VO₃⁻
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One of the reactions in the rechargeable lead/acid battery is shown. Pb(s) + PbO₂(s) + 4H⁺(aq) + 2SO₄²⁻(aq) → 2PbSO₄(…
KMnO₄ is an oxidising agent. Its reaction with Fe²⁺ is shown in the following ionic equation. ...X...MnO₄⁻ + ......Fe…
The equations for three reactions involving chlorine or its compounds are listed. 1 2KClO₃ → 2KCl + 3O₂ 2 4KClO₃ → 3K…
Which of these statements are always correct? 1 The sum of the oxidation numbers of all the atoms in a compound is ze…
Sulfur dioxide and oxygen react in the gas phase. 2SO₂(g) + O₂(g) ⇌ 2SO₃(g) ∆H = –197 kJ mol⁻¹ Which statements are c…
Three test-tubes, X, Y, and Z, each contain a small amount of water. • A small amount of NaCl is added to test-tube X…