Advanced Higher Chemistry questions and answers Graded A+

Advanced Higher Chemistry questions and answers Graded A+ Why does having an excess reactant help to convert costly reactants into products? - It provides the best chance for the limiting reactant to react completely. Normally the cheaper reactant would be the one in excess and can be recycled back into the reaction to save cost and avoid wasting materials. What are 3 different transition metals that can act as catalysts, give the names of the reactions? - Iron (Fe), Haber Process Platinum (Pt), Ostwald Process, Catalytic converters in car exhausts Nickel (Ni), hardening of veg oils to fats Why are so many catalysts derived from transition metals? - Because the vacant d orbitals are readily available for (reversible) bonding. (They show variable oxidation states) Explain in terms of electron orbitals, how transition