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Why can palladium metal be described as a heterogeneous catalyst?
Because palladium is a solid metal and the reactants are liquids or gases.
Why is an example of a heterogeneous catalyst?
catalysts which are in the same phase to that of reactants and products
What is meant by 'poisoning' a catalyst?
It means decreasing the efficiency of the catalyst, and slowing down the reaction. The chemicals used for this are called Inhibitors, although it may not contain any poisons or toxic chemicals
Why use reactant in the powdered form?
A lump of solid has a much lower surface area compared to a powdered catalyst. Since most chemical reactions that are catalysed by solid phase catalysts (heterogeneous catalysts) occur on the catalyst surface more surface area = faster reaction.
What term describes a substance rhat lowers the amount of energy needed to start a chemical reaction?
This substance is called a catalyst.
What is the main difference between a heterogeneous catalyst and a homogeneous catalyst?
The heterogeneous catalyst is not mixed with the reactants.
What is the difference between a homogeneous catalyst and a heterogeneous catalyst?
The difference between a homogeneous and a heterogeneous catalyst is that in a heterogeneous catalyst, it is in a different phase from the reactants. However, in a homogeneous catalyst, it is in the same phase as the reactants.
Is xenon heterogeneous or homogeneous?
heterogeneous and homogeneous are words used to describe a system, not a single element. For example, with regards to catalysis you could have a homogeneous catalyst which means one that works in the same phase as the reactant (i.e. both solid or both liquid or both gas) or a heterogeneous catalyst, which works in a different phase to the reactant, so a solid catalyst for a gaseous reactant etc.
Why can palladium metal be described as a heterogeneous catalyst?
Because palladium is a solid metal and the reactants are liquids or gases.
Why is an example of a heterogeneous catalyst?
catalysts which are in the same phase to that of reactants and products
What is meant by 'poisoning' a catalyst?
It means decreasing the efficiency of the catalyst, and slowing down the reaction. The chemicals used for this are called Inhibitors, although it may not contain any poisons or toxic chemicals
What is meant by catalist in chemistry?
A catalyst is a substance that speeds up a chemical reaction without being consumed by it.
How Phase-transfer catalysis is a special form of heterogeneous catalysis?
In chemistry, Phase-Transfer Catalyst or PTC is a catalyst that facilitates the migration of a reactant from one phase into another phase where reaction occurs. Heterogeneous catalysis refers to the form of catalysis where the phase of the catalyst differs from that of the reactants. Phase here refers not only to solid, liquid, vs gas, but also immiscible liquids, e.g. oil and water. The great majority of practical heterogeneous catalysts are solids and the great majority of reactants are gases or liquids. Phase Transfer Catalysis (PTC) is a special form of heterogeneous catalysis and known as a practical methodology for organic synthesis. By using a phase transfer catalyst, it becomes possible to solubilize ionic reactants, which are often soluble in an aqueous phase but insoluble in an organic phase. This means PTC is an alternative solution to overcome the heterogeneity problem in a reaction in which the interaction between two substances located in different phases of a mixture is inhibited because of the inability of reagents to come together. @ Tatvachintan.com
Why use reactant in the powdered form?
A lump of solid has a much lower surface area compared to a powdered catalyst. Since most chemical reactions that are catalysed by solid phase catalysts (heterogeneous catalysts) occur on the catalyst surface more surface area = faster reaction.
What term describes a substance rhat lowers the amount of energy needed to start a chemical reaction?
This substance is called a catalyst.
Is spaghetti with meatballs homogenous or heterogeneous mixture?
It is a heterogeneous mixture. The meat balls and the noodles are not mixed together and distributed evenly. Chocolate milk would be Homogeneous because the chocolate powder and the milk have mixed evenly.
Is bread heterogeneous or homogeneous?
Its heterogeneous.
