Reactions Definition and 625 Threads

I am learning, on my own, with the help of textbooks kindly given to me at Christmas by my grandfather and my own experimenting, some more advanced chemistry than what I studied in Grade Seven. Partly as preparation for High School, and partly for my own knowledge. However, I ran across some...

Hey guys, how can I tell whether a reaction is a redox reaction? For example: 2H[SIZE="1"]2O --> 2H[SIZE="1"]2 + O[SIZE="1"]2

hey guys! i am lost with my current unit...redox reactions. i was wondering if any chem whizzes could lead me in the right direction as how to write the oxidation and reduction equations for the following reaction: IO-3 (aq) + I- (aq)--> I2 (aq) Any help would be greatly appreciated! I...

A Very basic and simple thing I don't know for sure: Would you please tell me if an animal(including men) has instinct behaviors when itis stimulated ? Thank you

The reaction A(g) --> B(g) is spontaneous under standard conditions. Which of the following statements must be true? I. B(g) --> A(g) is nonspontaneous under standard conditions. II. A(g) will be completely converted to B(g) if sufficient time is allowed. III. A(g) will be completely...

Hey! Today I had a school visit to the UCL Chemistry department and was shown an Oscillating Reaction unfortunately I wasn't able to get the full 'recipe' to re-do the experiment so can someone be kind enough to write them down. Also! Would someone possibly direct me how to go on about...

I hate stoichiometry. Here's the problem: How do I figure out how many mols to multiply for each product and reactant? I've already been given the other part of the equation. Thanks

As I understand it, it's all atomic material in the accretion disk of a big black hole, with very high orbital velocities and high density. However, the the disk is quite flat, and cooler than one would think with the velocities involved, because the material is swirling in smoothly, with...

I need help finding reactions for a fixed cantilever. total length is 16ft and its fixed on the right side. The loads on it going from left to right. 2000 lbs at the end of the left. 1000 lbs 10ft from left. There is one support for the cantilever and its where A is at which is 6 ft from left...

Hi, I was doing a question on elimination reactions of haloalkanes. Could someone help me out? The question: "3-Bromo-3methylhexane rapidly undergoes elimination when boiled with ethanolic potassium hydroxide. Write the structures of the FIVE alkenes which might be formed, & name them."...

One question posed in a general chem book I have were the trends of a couple of reaction types. They don't answer the question of why, though. Maybe you can help... Identify periodic trends of these rxns: Set 1: H2 + X2 --> 2HX (X are halogens) Ex: H2(g) + Cl2(g) --> 2HCL (g)...

I thought I knew what I was doing but then I checked over some examples and now I'm not so sure... Finish the following reactions and balance the equations. NaOH(aq) + Fe(NO3)3(aq) --> NH3 --> N + 3H H2 + O2 --> 2HO Mg + H2SO4 --> That's all I did before stopping because I...

1st order, 2nd order Rate reactions HELP! I have read the section of my book over and over and studied the practice problems, but I still do not understand 1st order, 2nd order, or 0 order rate reactions. What does it mean to be of any particular order?

So, the average rate for a reaction of type A --> product is given by \text{rate} = -\frac{\Delta A}{\Delta t}. Also, \text{rate} = k \cdot \text{A}. The instantaneous rate for a reaction of that type is \lim_{\Delta t\rightarrow\0} -\frac{\Delta A}{\Delta t} = -\frac{dA}{dt}. Setting the...

The addition of sodium or potassium iodide catalyzes many SN2 reactions of alkyl chlorides or bromides. Explain. I think the reason why it catalyzes many SN2 reactions, has to do with the fact that it is the best leaving group of all the alkyl halides. But why else? Also, is the potassium...

Hello. Can someone please check my work and help me with these problems. I'm sorry it is so long. Predict and balance the following organic equation. -------------------------------------------------------- 1. Ethanol (ethyl alcohol) is burned completely in air C2H5OH + 3O2 >...

I am having trouble understanding this.. If reactions are spontaneous when they create more entropy (disorder), why is it that most spontaneous reactions are exothermic? Such as an exothermic reaction like A + B ---> AB + Energy, AB then has lower energy than the reactants, which also means...

Hi, I was doing a small experiment in class today, which was on Endo and Exothermic reactions. Basically, the purpose of this expieriment was to find out which systems underwent exothermic or endothermic reactions. 3 systems had been tested, and here are as follows... 1) Reaction between Steel...

I had some trouble balancing these using the "ion electron method", ordinarily I'd balance the half reactions (excluding H and O), add H20 to compensate for O, H+ to compensate for H, and electrons to compensate for charge. P4(s) + NO3-(aq) ---> H2PO4-(aq) + NO(g) (in an acidic solution)...

^^Double Replacement Reactions^^ NaOH+CuSO4 -> ? NH4I+AgNO3 -> ? K2CO3+ Ba(OH)2 -> ? KOH+ HI -> ? K2CO3 + HNO3 -> ? (NH4)2SO4+BaCl2 -> ? Na2S+ NiSO4 -> ? Pb(NO3)2+KBr -> ? Fe2(SO4)3 +Ba(OH)2 -> ? Hg2(NO3)2+KI -> ? Don't really get this...Please Help!

Hurricanes grow stronger over warm waters and correspondingly lose strength over cool waters. Hurricanes typically need an ocean temperature of about 80º F, 26º C, to form. This page shows the cooler waters following Hurricane Bonnie caused Hurricane Danielle following in Bonnie's wake...

Hi all, The other day in chemistry class, we carried out several different redox reactions. In one set of the experiments, we reacted potassium permanganate with 3 different potassium halides (KCl, KBr, KI). this particular redox reaction also requires an acidic environment, so sulfuric acid...

This is my first post here, so I'm not entirely sure whether or not this topic warrants a new thread. I've just had a simple idea that I'd like to get some feedback on, from people who have a little more experience in nuclear chemistry than I do. I was wondering if it would be possible to...

I have been reading about fusors. The articles usually refer to aneutronic reactions as though they are fusion. But are they really? For example, the pB11 reaction yields He, but this is some sort of fission isn't it? I.e. we start of with a heavier isotope and produce lighter ones through...

anyone know of any good forums that list Nuclei/particle/atomic reactions in a table. Sort of liket he list you can find in stellar burning(Caroll & Ostlie) but a list of everything(or a lot of reactions)?

Hi there! i feel confused at a question in my homework: Predict whether the following reactions can occur at low temperature a) CH2CH2 + (H+) b) CH3Br + RNH2 c) CH4 + HCl d) CH£Br + (CN-) I don't know what should be concerned, please help me. :rolleyes:

Help me understand please 0.6 mole of O2, 0.8 mole of CO and 0.5 mole of CO2 are added to a 2-L container. The system is heated and 0.15 mole of CO2 is formed. Does that mean that on top of the initial 0.5 mole of CO2 an additional 0.15 mole of CO2 is formed or does that mean that in total...

Does Nitrogen (N2) react with anything?

Working a problem in Greenburgs "Advanced Eng. Mathematics", #8 page 170. Two substances w/ concentration x(t) and y(t), react to form a 3rd substance w/ concentration z(t). The reaction is governed by the system x’+ αx = 0 z’= βy x + y + z = γ solve for x(t), y(t), and Z(t) subject to...

Is there away tio reduce the smoke produced in a [combustion] reaction? Theoretically, there is no smoke produced at all (only water and carbon dioxide), but because of the impurities, imcomplete combustion, moisture, obviously, smoke is a common product of burning something. How can I...

1. I have to calculate the voltage of a standard cell with the following half-cell reactions: Ni(s) ---> Ni2+ + 2e- 2e- + Cl2(g) ---> 2Cl- 2. By the electrolysis of water, 11.2L of oxygen at STP was prepared a) What charge was required? b) If a current of 0.5A was used, how long did it...

Hello. How do we know which reaction is favored? I know that: -a primary alkyl halide favors the Sn2 -weak bases promote sn2 because they can attack sp3 carbon more easily Let's say we are given an electrophile and a nucleophile. Is there a foolproof trick which determines which...

1.How would temperature effect the rate of a reaction? Would it increase its kinetic energy thereby speeding up the reaction. Is it right in saying that as the temperature increases, the frequency of collisions increases between molecules, and the orientation changes? 2. If we have 4Fe +...

Hello, I really want to thank everyone that has helped me in understanding chemistry. I have started a few questions on rates of reactions and would love it if someone could look over my answers and see if I am headed in the right direction. 1) The rate of a simple chemical reaction like...

[FONT=Comic Sans MS]I'm trying to find out if there is another way to excite mercury other than temperature, say for instance what would the reaction be if a stungun was fired into a bucket of mercury, and would the result be the same if it happened in a vacuum? novice at this

I'm guessing the answer is a). I found a similar problem except if the bicarbonate was mixed with water instead. And the selections were: H3O(+), OH(-), CO3(2-), H2CO3 I think the answer to that question would be H2CO3 since it's asking for the conjugate acid which will be the form of...

1) State whether aqueous solutions of the following salts are acidic, basic, or neutral. a) NH4N03 I think this is acidic due to the hydrolysis of the NH4 ion, which produces H+ ions? b) KH2PO4 not sure about this one, since it is a diprotic acid and ionizes in more than one step any...

Some principal nuclear fusion reactions which have been considered are: 1) D + T -> n + 4He 2) D + 3He -> H + 4He 3) D + D -> H + T / 3He + n 4) T + T -> 4He + 2n 5) T + 3He -> (various products) 6) H + 11B -> 3 (4He) from G. H. Miley, H. Towner and N. Ivich, U. of...

Could anyone give me a few examples of endothermic fusion reactions between elements solid at room temperature?

Hello; thank you in advance for anyone who would like to help: I am looking for the products of these reactions: ZnSO4 + NaClO --> I thought it was just a double displacement, which would make my reaction equation: Zn(ClO)2 + Na2SO4 but a test with silver nitrate was positive for Cl-...

Hi, i woud like to ask one thing... Discuss the idea that the standard of living in a society might be measured in units of kJ/person available in that society. ...just instruct me how to do this question i mean what answer they are looking for...

Hello. Could anyone help me out with a question I'm stuck on? Thanks in advance. Calcium metal reacts with hydrochloric acid in a calorimeter and the enthalpy change is determined. Similarly, the enthalpy change for the reaction of calcium oxide with hydrochloric acid is determined. What...

Are there any endothermic reactions that can release the converted heat energy as electricty? How do they work? I wonder if it is possible to create something that will convert heat to electricty all the way down to refridgerator temps... they you got your personal power generator and a...

I'm having some trouble with getting the correct entahlpy for the rxn: NaOH + NH4Cl --> NaCl + NH3 + H2O I've gotten the net ionic to be: OH + NH4 --> NH3 +H2O individuals to be sum of products (-) sum of reactants: (-80.83+-285.84)-(-229.94 (for OH) and NH4 doesn't show anyvalue...

LIMITING reactions(please help me! (is it that hard?)NEED A CHALLENGE? hi, i was wondering if anyone could help me out with my chemistry 1 stuff. The proffessor isn't explaining it very well to me. so...well, here's the question, i need help with limiting reactions, O2 + 2No2-->2NO2, if they...

Hi ppl. I'm asked a question: Iron filings are added to a solution containing the ions Cu2+, Fe2+, Fe3+, H30+ and Zn2+. Deduce what reactions occur from the standard electrode potentials. Is this simply asking me which will change Fe2+ to Fe3+ and vice-versa by reduction or oxidation do you...

can some tell me how to write net ionic equations of acid base recations in the cases of a weak base reacts with a strong acid, a strong base reacting with a weak acid, and weak base reacting with weak acid? How do you cancel things out? Also, does NH3+HCl--->NH4Cl or NH3+HCl--->NH4+Cl-?

The directions say to give the net ionic equation for the principal reaction. I did the first couple right (I think) but don't know how to proceed: (the part by the number is the question and my answer is 2 spaces below) 1. NH4Ac(aq) + HCl(aq) -> ? H+ + AC- -> HAc 2. NH4F(s) +...

I'm having trouble keeping all these alkene reactions straight (hydroboration, oxymercuration/demurcuration, etc.) is there a useful website or an easier way to categorize/remember which reagents go with a particular reaction? My book isn't much help. Need help!

CH3OH is produced via the reaction CO(g) + 2 H2(g) -> CH3OH A mixture of 1.20 g H2 and 7.45g CO are allowed to react. What is the yield of CH3OH? [Assume theoretical yield in g is what is wanted here]