Final answer:
Predicting chemical reaction products requires understanding the reactivity and properties of the reactants. For example, reactions of iron with sulfuric acid produce iron sulfate and hydrogen gas, while chromium reacts with oxygen to form chromium(III) oxide.
Step-by-step explanation:
Predicting the products of chemical reactions involves understanding the reactivity of components and applying rules such as the activity series, solubility rules, and acid-base neutralization. Given the reactions, here are the predicted products:
- Fe(s) + H₂SO₄(aq) → FeSO₄(aq) + H₂(g) Iron sulfate and hydrogen gas are formed.
- FeCl₃(aq) + NaOH(aq) → Fe(OH)₃(s) + NaCl(aq) Iron(III) hydroxide precipitate and sodium chloride in solution are produced.
- Mn(OH)₂(s) + HBr(aq) → MnBr₂(aq) + H₂O(l) Manganese(II) bromide in solution and water are produced.
- Cr(s) + O₂(g) → Cr₂O₃(s) Chromium(III) oxide is formed as a result of the reaction between chromium and oxygen.
Each reaction and its products depend on the valency state of the metal, the reactivity, and whether the reaction conditions favour the formation of certain compounds.