Catalyst Definition and 61 Threads

Hey, I am having trouble understanding the type of reaction that occurs between potassium iodide, and hydrogen peroxide. A website I looked at said that potassium iodide was a catalyst for Hydrogen peroxide, but potassium iodide doesn't work in the same way that a catalyst described by a...

Basically it's a well known reaction, many kids on youtube make it for the views: I am thinking, since AlI3 sublimes can it be put in say tungsten bottle (is this even a thing??) and then used as a rocket the same way Na+H2O or HCL+Al rockets are used - the gas escapes? This phase...

Hello ! We all now that enzymes lower the activation energy by creating both covalent bonds and week non covalent bonds , in this book , about how the enzyme lower the activation energy using covalent bonds they said : this sentence is not compatible with a basic principle that i learned in...

What methodology is used for developing new catalysts with desired properties? To give some real world example, today chemists and chemical engineers try to find electrocatalysts needed for reduction of oxygen in hydrogen fuel cells and for oxidation of water in water electrolysis needed to...

My solution in shown on the attached files. The overall reaction between Mn02 is 0.81 Volts The overall reaction which shows the reformation of the MnO2 catalyst is .27 Volts. The first reaction is more positive which shows that the MnO2 can work as a catalyst.

I am interested in build a hydrogen stove for cooking and wish to use a catalytic stove. I cannot find much information about this anywhere, but only that nickel can be used for hydrogen rather than platinum. 1) Can I just use stainless scotch brite scrub pad as catalyst assuming it...

I left it on for about 3 weeks, most of the time it was in below curing temperature, sometimes below freezing, but i gave it about 15 hours of 20c+ to try to cure it. It never did, and still smelt really bad. I decided to rip off the resin that had hardened. Underneath it, the polyurethane foam...

I have little knowledge of MATLAB. I am trying to model the concentration profile along the photocatalyst film thickness in a photoreactor. Mass Transport takes place by diffusion and the rate of generation of component is given by rA. Boundary conditions: Concentration of the component that is...

Homework Statement I was reviewing chem the other day, and noticed this question can anyone clarify my answer for me and let me know if I'm correct. The question states: Describe three uses of rhodium as a catalyst. ( include both a written description and the balancecd equation). Homework...

Is there a reaction of which the product is the catalyst for that same reaction?

My question concerns the resultant particles of a co precipitation reaction. What effects occur when you accelerate/decelerate a co precipitation reaction? What are optimal conditions (speed, etc.) for this process? I am interested primarily in the effects on the resultant powder. Thank you.

what are those 'R' atoms(highlighted in red)? Also,What is finely divided Nickel(marked in red)? I will be thankful for help! Note:I am a High School student and English is my second language!

Hi there. We are working on a school science project to compare how different catalysts in water splitting affect the energy/voltage needed to carry out the process. One of our catalysts will be Co-Pi, which is created by adding Cobalt-nitrate to a .1M phosphate buffer solution during...

I have 2 queries and would be great if someone can lead me to some specific answers - 1. Is it possible to oxidise a complex hydrocarbon like Ethanol or Gasoline in a non-combustible but exothermic reaction? 2. If this kind of oxidation is possible, what would be the best catalysts to achieve...

In many chemical reaction, Pt is used as catalyst often. I'm wondering for what reason Pt is used in many process.

The question is: Which takes place when a catalyst is added to a reaction at equilibrium? A. The point of equilibrium is shifted to the right. B. The point of equilibrium is shifted to the left. C. The forward and reverse reactions rates are increased unequally. D. The forward and reverse...

< Mentor Note -- thread moved to HH from the technical forums, so no HH Template is shown > experiment for testing type of catalyst on reaction rate? I need an experiment (just the method) Where I can test the reaction rate of changing the catalyst type I need about 3 differnet catalysts e.g...

can I grab electrical energy from a car catalyst? do the reactions produce electricity?

Currently looking up all sorts of stuff about monopropellants(and catalysed reactions), but when anything talks about catalysts, they never say which one. Do all chemical classed as catalysts catalyse anything, could a catalyst bed H2O2 monopropellants decomposition just be a chunk of any random...

Hi there, I am doing an experiment in increasing the mass of MnO2 when it is added to H2O2 decomposition, and I'm measuring the rate of temperature change. I chose increments of 0.050, 0.100, 0.150, 0.200, and 0.250 g to put into H2O2 when it is decomposed, i.e. the MnO2 is a catalyst. I...

OK I clicked a bunch of similar discussions, but it still makes no sense, I barely know what a catalyst is, besides the fact that they do affect the rate of reaction but not the equilibrium expression or pressure, which just got me hella fudged up. And i don't want any over complicated...

I have also posted this question here: Relationship between surface area of electrode and reaction rate of hydrogen in fuel cells, but I really need an answer before tomorrow morning so I hope you don't mind me posting it here as well! I am looking at the effects of increasing the surface area...

Can graphite be used as a catalyst to break down ozone into oxygen without serious oxidization? The applied use for this is to break down ozone at the output of an ionic wind "fan". Similar operation to an ion thruster used by NASA but instead of using stored gasses and propelling them into...

This might be a stupid question so forgive me if it is. I am looking for a way to make methane more useful as a fule and it seems to me that to do that I would have to make it into a longer hydro-carbon chane. Is there a catalyst that could be used to do this? Thanks in advance.

what makes some particular elements and compounds a good catalyst for a particular reaction?

With galvanic cells, we assume that the redox reaction is kinetically inhibited so that equilibrium takes a long time to reach, so we can make a good measurement of the potential difference V. I thought fuel cells were the same originally, except that we recycle in reactants and products to make...

Dear friends I've been searching about catalyst pellets and found absolutely nothing about how to make them once all we have is the catalyst. We need something to 'join' the particles together, the pressing of the powder only won't work on most cases. Any help will be very much...

I know a Lindlar catalyst will cause syn addition of hydrogens to an alkyne and then stop at an alkene, but what about a molecule that has both an alkyne and an alkene in it to start. Is the alkene taken to an alkane or is it simply not affected? Thanks for your answers.

We are taught that adding a catalyst to an equilibrium system does not alter the position, just the rate of equilibrium attainment, because it increases the forward and backward rate by the same amount. Why and how can that be? The activation energies will be different for the forward and...

how the rate of heterogeneous reaction changes with the surface area of catalyst. can anyone tell me about the equation relating both quantities?

Does increasing the amount of mass of the catalyst increase the rate of reaction? I'm not sure as increasing the volume of one reagents doesn't increase the rate of reaction. But for a catalyst I'm not sure if it works the same way. If the catalyst is solid then the concentration will be...

The reaction between sodium carbonate and calcium chloride gives the table salt and calcium carbonate. The reaction takes place immediately after mixing two solutions. Can anyone suggest me how the reaction can be slowed down? Thank in advance Peace Deb

Hello, I will be experimenting with hydrogen peroxide from 5-60% concentrations and small amounts of alkaline metals to measure how much gas is produced in under 5 min. I understand that hydrogen peroxide is a dangerous chemical if not handled right. My question is that on the MSDS it says that...

What the relationship between catalyst and thermodynamic. In activation energy as we know, it reduces the activation energy and what about thermodynamic way?

There are many reactions in which i don't understand what the role of catalyst is. Reactions like hydrogenation of alkenes , use of Ni i understand - it kinda breaks the hydrogen-hydrogen bond and provide it for the alkene. In contact process i.e. SO2 + 1/2O2 ----> SO3 catalyst is V2O5. I...

How exactly does a catalyst (platinum.. with carbon.. something?) removes the electron from a hydrogen atom? (that means that quite a lot of energy was given to the hydrogen atom and the electron and proton separately (and the two particle system together) has more energy now.) Does the energy...

Does a catalyst affect the equilibrium constant of a reaction too? I believe it affects both the equilibrium constant and rate constant.

Homework Statement There's a catalyst pellet in a reactor and I'm supposed to prove an equation for the maximum temperature which is: Tmax=Ts +[(-H)*(D*Cas)]/k Tmax= max temp, Ts = temp at catalyst surface, T=temperature, H=enthalpy of rxn, D=diffusivity, Cas= concentration at...

I don't really understand about catalysts... I am thinking about an exothermic reaction in the presance of a catalyst. My understanding was that the catalyst lowers the energy threshold for the reactants to commence reacting. ( I think that was gotten from shell theory and bonding energys )...

In the nitration of benzene using conc. H2SO4 and HNO3 at 55 degrees celsius, is concentrated H2SO4 a catalyst for the reaction?

Is there a way to determine how quickly gasoline or something else would burn at a specific temperature with a specific amount of platinum and oxygen present? Or at what temperature it will auto-ignite at with a certain amount of oxygen and platinum present?

How silly is this? Catalysts work as sort of small chemical reactors - they react with molecule of substance one and then the molecule of substance two is brought in the reaction so those two can react now creating one or more new molecules as a final result and also, by the way...

Hello everybody! I am working on bubble formation issue in electroosmotic pumps. Those bubble are formed by water electrolysis on platinium electrode and I am searching for catalyst for water recombination compatible with biological applications to at least slow down the bubble formation...

1. I need to know which compound out of Copper Sulfate, sodium chloride, potassium iodide and magnesium sulfate will be the best catalyst for the reaction between ALuminum metal and Hydrochloric acid. 2. The chemical equation is : 2Al(s) + 6HCl(aq) -> 2AlCl3(aq) + 3H2(g) 3. I...

I recently did an organic chem lab in which we brominated acetanilide. Now the benzene group had an acetamido group attached to it, which is less powerful activator than an amide (NH2) group but still directs to the ortho and para positions. I can understand that due to steric hindrance...

this EurekAlert page links to a MIT press release describing the operation of the new catalyst and potential applications http://search.eurekalert.org/e3/query.html?qt=Nocera&col=ev3rel&qc=ev3rel&x=12&y=16 Dan Nocera is the main person responsible. Here's a ScienceDaily account...

i have a whole bunch of potassium chloride and will be getting more soon. ive been attempting to obtain pure potassium by electrolysing the molten potassium chloride. so far ihave tried using a car battery, 12v-45a and a 15v-u/k amperage lithium-polymer battery charger(which I've also used...

Mg (s) + 2HCl (aq) - > MgCl2 (aq) + H2 (g) I'm looking for a catalyst. Any suggestion?

Hi. Heres the question: A 6L flask containing carbon monoxide at 200kPa is connected by a closed stopcock to a 3L flask containing oxygen gas at 800kPa. If the stopcock is opened, calculate the pressure of the system, assuming constant temperature. a) if no chemical reaction occurs b)...

hi can someone please help me with this question "does sunlight affect oxidation of vitamin C" I have seen this as a common science fair topic and I have also done an experiment myself and have found that it does speed up vitamin C oxidation, But I don't know why! can someone please help me...