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ChemSiddiqui

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Posts posted by ChemSiddiqui

  1. Would you get off the "drinking is bad" because God says so nonsense! God said no such thing. A bunch of humans who wanted to control the populace said such things and pretended that it was god who wrote it.

     

    Promises for the afterlife are crap! Talk about a carrot on a stick. :doh:

     

    iNow, Firstly I thinks it isn't a very good place to discuss this but I have read in the quran in which God says not to consume product that could make you lose your mind i.e. things like alcohol. You see thats the problem about Islam...very few people know alot of things about Islam. Like Jihad is Holy war as people call it, my answer...rubbish

     

    Doing justice to the title of the thread here are some more of the pics:taxol.jpg

  2. Just don't drink again. Promise God and to yourself. Its haram for a reason becuase it isn't good for your health...otherwise there is alcohol in heavens. Please follow my advice my friend. Just a sarcastic note by the way if you don't mind... did the prophets or Mulsims of yesteryear drink when they won a battle?

     

    Anyway forget it,its going off the topic. Sorry can't post more wallpapers, i have exceeded my quota as it tells me.....:doh:!

  3. Dear sir

    I want to make jelled methanol. How i am do this. please help about this.

    prem jalani

     

     

    Hi Prem, First of all you don't have to be too formal here. This forum is for friendly discussion. Secondly, why you want to make gel methanol for. Tell me and i shall try to help. Is it for a project you were assigned?

     

    Good day!

  4. How can you imagine celebrations without beers and wild dance under the sounds of DISTURBED?!!!

     

    Alright then. But for me I won't drink... I am not allowed and don't want to either ( I am a Muslim)!

     

    By the way great pics again. I wonder you have a chemistry pic library:rolleyes:!

  5. Hi,

     

    I want to buy my elder brother a PSP this summer for his birthday. I want to start straight way looking. I was wondering which retailers will be the best to buy from...Argos is the only one I know. And aslo do you think PSP is worth buying because I know people who are opposed to PSP (they say its watse of money). By the way Its in the UK i want to buy from... I live in London!

  6. Using the same reaction in equillibrium:

     

    CH3CO2H + C2H5OH <-------> CH3CO2C2H5 + H20

     

    The reaction quotient will be 2/2 = 1 right (correct me if I am wrong). This is less than the kc of the reaction so the reaction should yeild less products and more reactants. But the mark scheme says the reaction sould yeild more products because the equillibrium amount is 0.1 + X and not 0.1 –X . So firtly clarify this point to me.

     

    Also say the RQ is less than kc i.e. the reaction will have the left shift, then sould the equillibrium amount be 0.5 + x in this case?

  7. O... I see you have to apply Le Chateleir's principal here then to see which direction the equillibrium shift and then determine the concentration. I understand completely now thank you very much zule. Good chatting with yeh.

     

    One more thing to hermanntrude. when you find the reaction quotient to determine the direction of shift of equillibrium, does the equillibrium amount of reactant remain the same all the time regardless of the direction of the shift?

  8. Ok. But what I wanted to ask was why it is 1 +X than 1-X amount after the equillibrium? although I understood what you had to say in your post but I am actually confused about the equillirium amounts? Sorry if it is annoying to you!

  9. Hi all!

     

    I was doing some past papers and I have some problem. The question was:

     

    Q. Alcohols and esters are important organic compounds which are widely used as solvents.

     

    Esters such as ethyl ethanoate can be formed by reacting carboxylic acids with alcohols.

     

    CH3CO2H + C2H5OH <------> CH3CO2C2H5 + H20

     

    For this equilibrium, the value of Kc is 4.0 at 298K.

     

    A mixture containing 0.5 mol of ethanoic acid , 0.5 mol ethanol, 0.1 mol ethyl ethanoate and 0.1 mol water was set up and allowed to come to equilibrium at 298K. The final volume of the solution was V dm3.

     

    Calculate the amount, in moles, of each substance present at equilibrium.

     

    My try at the solution:

    CH3CO2H + C2H5OH <------> CH3CO2C2H5 + H20

    Initial amounts:

    0.5 0.5 0.1 0.1

     

    Equilibrium amount:

     

    0.5 – X 0.5 – X 0.1 – X 0.1 – X

     

    Concentrations at equilibrium:

     

    0.5 – X 0.5 –X 0.1 –X 0.1 -X

    V V V V

     

    Kc = [CH3CO2C2H5] [H20]

    [CH3CO2H] [C2H5OH]

     

     

    Putting values in the formula makes:

     

    4 = (0.1 –X)^2

    (0.5 – X) ^2

     

    4(0.5-X) = 0.1 –X

    X = 0.63Then evaluating each amount in equilibrium using x.

     

    But the mark scheme says that the value of x is 0.3. Also mark scheme says that amount in moles in equilibrium of water and ethyl ethanoate will be (1 + X) than (1-x)? That’s my question why is it?

     

    Any help will be appreciated!

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