R2 Reactivity 2: How much, how fast and how far?

Practice questions on Reactivity 2: How much, how fast and how far?

• Explain how increasing the concentration of a reactant in solution increases the rate of a… (4 marks, Explain)
• Explain why finely powdered calcium carbonate reacts faster with excess hydrochloric acid … (4 marks, Explain)
• Explain why increasing the temperature of a reaction mixture increases the rate of a chemi… (4 marks, Explain)
• Explain how an atom economy calculation differs from a percentage yield calculation, and o… (4 marks, Explain)
• Explain how the concept of a limiting reagent determines the theoretical yield of a produc… (4 marks, Explain)
• Explain why the mass of carbon dioxide produced when excess hydrochloric acid reacts with … (4 marks, Explain)
• Sodium hydrogencarbonate, NaHCO₃, decomposes on heating according to the equation: 2NaHCO₃… (4 marks, Explain)
• Explain why the percentage yield of a reaction is almost always less than 100%, referring … (4 marks, Explain)
• Explain how the addition of a catalyst increases the rate of a chemical reaction. (4 marks, Explain)
• Explain why two reactions with identical activation energies can have different rates at t… (4 marks, Explain)
• Explain why the value of the equilibrium constant, K, for a given reversible reaction chan… (4 marks, Explain)
• Explain why, for a reversible reaction at equilibrium, increasing the concentration of a r… (4 marks, Explain)
• Explain why the equilibrium constant expression for the reaction N₂(g) + 3H₂(g) ⇌ 2NH₃(g) … (4 marks, Explain)
• Explain why a mixture of SO₂(g), O₂(g) and SO₃(g) in which Qc > Kc is not at equilibrium, … (4 marks, Explain)
• A student dissolves excess solid silver chloride, AgCl(s), in water at 25 °C and allows th… (4 marks, Explain)