1. What is the type of the following reactions: BaCl2 + MgSO4 → BaSO4 + MgCl2, 2 H2 + O2 → 2 H2O, NaOH + CH3COOH → CH3COONa + H2O, AgNO3 + KI → AgI + KNO3, 2 NaBr + Cl2 → 2 NaCl +... 1. What is the type of the following reactions: BaCl2 + MgSO4 → BaSO4 + MgCl2, 2 H2 + O2 → 2 H2O, NaOH + CH3COOH → CH3COONa + H2O, AgNO3 + KI → AgI + KNO3, 2 NaBr + Cl2 → 2 NaCl + Br2, 2 Na + Cl2 → 2 NaCl, H2CO3 → H2O + CO2? 2. Calculate the oxidation number of: Manganese in KMnO4, MnSO4, MnO2; Chromium in K2CrO4, K2Cr2O7; Oxygen in H2O, O2, H2O2. 3. What is a decomposition reaction? What is the general equation for this reaction and give an example? 4. Compare between: Lewis acid and Lewis base; Oxidant and Reductant. Read more

BaCl2 + MgSO4: Double Displacement; 2 H2 + O2: Combination; NaOH + CH3COOH: Neutralization; AgNO3 + KI: Double Displacement; 2 NaBr + Cl2: Single Displacement; 2 Na + Cl2: Combination; H2CO3: Decomposition.

1. Reaction Types:

• BaCl2 + MgSO4 → BaSO4 + MgCl2: Double Displacement
• 2 H2 + O2 → 2 H2O: Combination
• NaOH + CH3COOH → CH3COONa + H2O: Neutralization
• AgNO3 + KI → AgI + KNO3: Double Displacement
• 2 NaBr + Cl2 → 2 NaCl + Br2: Single Displacement
• 2 Na + Cl2 → 2 NaCl: Combination
• H2CO3 → H2O + CO2: Decomposition

2. Oxidation Numbers:

• Manganese: KMnO4: +7, MnSO4: +2, MnO2: +4
• Chromium: K2CrO4: +6, K2Cr2O7: +6
• Oxygen: H2O: -2, O2: 0, H2O2: -1

3. Decomposition Reaction:

• A type where one compound breaks down into two or more substances.
• General Equation: AB → A + B
• Example: 2HgO → 2Hg + O2

4. Comparisons:

• Lewis acid: electron pair acceptor, Lewis base: electron pair donor.
• Oxidant: gains electrons, Reductant: loses electrons.