ways how to reuce the rate of chemical reactions?
96110
You should spend less time on chemistry and more time on your ability to produce and English sentence that is grammatically correct.
195778
1.  C(s)+O2--> CO2(g) - 393.5 kj\n2.  H2(g)+1/2 O2(g)--> H20 -285.8 kj\n3.  2C2H2(g)+5O(g)-->4CO2(g)+2H2O(... -2598.8\nCALCULATE the value for the reaction 2C+H2-->C2H2\n\nFirst balance eqn 3 with 5O2 (g) then reverse it so that you have 2C2H2(g) on the RHS. Of course, you will change the sign of the eqn as well. Now halve it so you have one C2H2 instead of 2. Let's call the new eqn number 4\n\nSecond, double the 1st eqn. Let's call it eqn 5\n\nLastly, add eqns 3, 4 and 5:\n\n4 2CO2(g)+H2O --> C2H2(g)+5O2(g) +1299.4 kJmol-1\n5 2C(s)+ 2O2--> 2CO2(g) -787.0 kJmol-1\n3 H2(g)+1/2 O2(g)--> H20 -285.8 kj\n----------------------------------------------\n  2C(s)+ H2(g) --> C2H2(g) + 226.6 kJmol-1
660043
1.) do your own homework\n2.) this is the computer forum, not high-school chemistry.  Next time post to the right furom.
268703
Use the overall rate equation: rate = k[A]^x[B]^y...\n1) define for rate1 and rate 2 with the appropriate concentrations.\n2) divide both sides (e.g. rate1/rate2 = ...\nNote that this cancels k\n3) Solve for x, y, ...  These are your respective orders.\n4) Add x, y, ...  This is your overall order.\n\nYou can get the value of k by:\n5) Plug in values of x, y, ... to either rate1 or rate2 equation.\n5) Solve for k.
250273
Enough to cancel out the H's. For the reaction with 2H's, add 2OH's to both sides. For the reaction with 3H's, ad 3OH's to both sides.\n\nH + OH --> H2O\n\nEDIT: Oh, well in that case, the H's cancel out, so you have just one H on the side that previously had 3. Then, just add one OH to both sides.
679000
time= 2.303/(rate constant) log( initial conc / final conc)\n\nthis is for a first order reaction...
756485
The water isn't involved in the reaction, so take it out.  Then, just put a 2 in front of the Nh2(SO3)H and a 2 in front of HNO3, and you're finished.\n\nNow, go take a nap or go to sleep...
444111
Rate of reaction depends upon the concentration of reactants. Since, 6M HCl has a greater conc. than 3M HCl, rate of reaction decreases when Mg reacts with 3M HCl
182435
Well, there are a lot.\n\nSubstiution:\n\nR-OH + SOCl2 ---> R-Cl\n\nElimination\n        \nR-R'-OH ---->  R=R' + H20 (with an acid catalyst and heat)\n\nReduction:\n\nR-OH ---> R-CH3 (Barton Reduction)\n\nOxidation:\n\nR-OH ---> R-COOH\nR-OH ---> R=O\n\nThen alcohols can act as nucleophiles, so there is a another set of reactions. But I've listened enough, imho.
887756
Basic balancing of chemical reactions. You can always add CO2 O2 and H2O to either side. Start with the Carbon. balance the Oxygen last since it is contained in CO2 and H2O.\n\n1) 2 C6H6 + 15 O2 ==> 12 CO2 + 6 H2O\n2) C12H22011 + 12 O2 ==> 12 CO2 + 11 H20\n3) C3H6O + 4 O2 ==> 3 CO2 + 3 H2O\n4) C4H10O + 6 O2 ==> 4 CO2 + 5 H2O\n5) C4H10O + 6 O2 ==> 4CO2 + 5 H2O
92261
1.  Heat speeds up a reaction by increasing vibrations and energy of the reactants.\n\n2.  Concentration speeds us a reaction by making more reactants available in a unit volume.\n\n3.  Catylists speed up a reaction (without being used up) by allowing reactants to come into closer proximity.\n\n4.  Increased surface area (by grinding, etc.) speeds up reactions by making more reactants exposed to reaction.
266694
Balance the equation.\n\nDetermine what the limiting reactant is.\n\nDetermine how much product can be produced from the limiting reactant.\n\nDetermine how much of each reactant is needed to fully react the limiting reactant.  The remainder of each reactant is the excess.
311730
I think you should keep it simple yet smart. First get a piece of pure elemental Sodium and then let it drop on warm water. Afterwards explain how the chemical reaction released Sodium Oxide and Hydrogen Gas.
947088
Pressure a higher pressure will push the molecules closer to each other so the reaction takes place faster cause the molecules colide more often.\n\nAmounts of the chemicals, will take longer as you increase each to fully react because there is more to react.\n\nConcentrations of the liquids a higher concentration will have more of the molecules to react.\n\nAnd the amount of activation energy if the amount is low the reaction will procede at a faster rate.
84780
!!!!!!!!!!!!!!!! \nI think rather u wanted to ask how can u predict the formula of a chemical reaction!!\nFirstly, we have to determine the moles of reactant taking part.(It can be done easily, think A reacts with B, just mix 1 mole of A with the same amount of B.)\nThen determine what are the different products and their amounts.\nAll u have to do is some calculations..................\nRemember its not as easy as it sounds.
290614
chemical reaction\n\nall substance give off some heat during change\n\nlook up kinetics on the web
824613
Rate of chemical reactions depend on - temperature, pressure, concentration and the use of catalyst. The rxn constant (generally used in equilibriums) is often calculated to able to see the rate of the reaction. \n\nX + Y <----> 2V + Z\n\neq constant =  ([V^2]x[Z])/[X]x[Z]) \n\nThe higher the constant, the higher the rate. Equilibrium constant only changes if the there's a temperature change. Concentration changes doesn't effect the constant however it effects the rate. Although pressure changes lead to temperature changes, it's assumed that pressure changes don't effect the constant. If the constant is greater than 10^6, rxn will take place at reasonable rate.