Q:I know that a species that does not appear in the chemical equation may also affect the rate of a reaction - e.g. a catalyst. But does that mean the catalyst can be present in the rate equation, and if so are catalysts always present in the rate equation?

Any reaction with a finite amount of reactants has a half-life, whether it's first order, second order, zero order or complex order. The half-life (t?) is defined as the time taken for the reaction to go half-way to completion. If the reaction is: A + B ---products and A is in excess, then t? will be the time taken for half of B to be used up. For all reactions, then, you get a decay curve. For zero-order reactions, this 'curve' is a straight line, but for all other orders, the curve is an actual curve and it is quite difficult to distinguish, by visual inspection alone, whether it is exponential (indicating a first-order reaction) or hyperbolic (indicating a second or higher order reaction).

Q:in acid-catalyzed reaction,there are some books show the acid catalyst as H+ and there are some show it as H3O+ .Are they the same?

Short=yes they are. Long version Traditionally, acids were defined to be compounds that produce H+ ions when dissoved in water (Arrhenius theory). But this definition is limited to acids that can be dissolved in water. Br?nsted-Lowry then formed a definition which states that acids are compounds which donates a protons or H+ ions. If u think about it, a H+ ion is practically a proton. a proton with no electron outer shell is far too reactive to stay in its current state. thus it will form a bond with H2O to form H3O+ Because of this, acid catalysts are supose to be H3O+ instead of H+. But since it is more convinient to use H+, the form of writing H+ remained instead....... and yes...... the scientists were lazy......

Q:What are the catalysts for making oxygen in chemistry? (At least 8 listed)

Manganese dioxide, iron oxide (red brick powder), copper oxide, ferrous oxide, iron oxide, activated carbon, egg shell, fresh liver, raw potato chips, etc.

Q:Is it faster or slower? The What if you do not?

Reduce or increase the energy required for the reaction, can also slow down, do not have no effect on the reaction

Q:High chemistry: Does the catalyst affect the heat and heat of the reaction?

The catalyst that has no effect affects only the rate of reaction

Q:Explain how a catalyst may increase the rate of chemical reaction?

Lowers the activation energy of the reaction. Like a hill, it makes the hill lower so the reaction can proceed faster and at lower temps. Delta G is lowered. Meaning less energy is needed to move the reaction forward. Catalysts (enzymes) are substrate specific. only specified compounds like a right glove only fits a right hand and not the left hand.

Q:In the catalyst and light conditions to break down the water to get the chemical equation of hydrogen

2H2O = (light or catalyst) 2H2 ↑ + O2 ↑

Q:What is the difference between a catalyst and an oxidizing agent?

a catalyst DOES NOT take part in the reaction. it merely speeds it up. Without a catalyst, the reaction would still occur, just slower. However, reactions with oxidizing agents CANNOT and WILL NOW take place without them. They gain electrons and are also considered the thing that is reduced. At the end of the reaction, they have been altered in some way, unlike catalysts.

Q:Chemical Glossary: Catalyst

The catalyst is a substance that can change the rate of the reaction without changing the standard of the reaction Gibbs free, according to the definition of the International Pure and Applied Chemistry (IUPAC) in 1981, Enthalpy change. This effect is called catalysis. The reaction involving the catalyst is a catalytic reaction.

Q:The size of △ H in the thermochemical reaction equation is related to the use and unused catalyst

There is no relationship between the catalyst can only change the reaction rate