• We need your support!

    We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
    Click here to Donate Now (View Announcement)

Search results

  1. G

    Chemistry Reaxns, conditions

    and for a reaction of alcohols with halogen acids (e.g. HCL, HBR, HI) you use ZnCl2 as a catalyst. (CH3)2 CH CH (OH) CH3 + HCL ---- ZnCl2 + reflux ---> (CH3)2 CH CH (Cl) CH3 + H20
  2. G

    Chemistry Reaxns, conditions

    then what was is that you meant? anywyas, for hydrolysis of halo alkane, its a reaction with NAOH(aq) or KOH(aq) and also results in the formation of an alcohol. it goes like this, CH3CH2BR + NAOH(aq) ---- reflux ---> CH3CH2OH + NABR or CH3CH(cl)CH2CH(cl)CH3 + KOH(aq) ---- reflux -->...
  3. G

    Chemistry Reaxns, conditions

    if you get confused with esterification then just consider it as a condensation reaction, where a corboxylic acid and alcohol join to make an ester and release a water molecule. the acid releases the H+ ion while the alcohol releases the OH- ion. and the example you gave is no where near...
  4. G

    post your Physics and Chemistry querries

    how on earth do you have alot of time! we got like no time left and i cant solve any past paper fully and now im freaking out! looks like your prep is good, best of luck with it.. anyways my question is how do you find bond angles? cause all my sir thought us was 120 and 109, i never knew there...
  5. G

    CHEMISTRY 22!!!

    so how accurate are these guesses? are they based off of some known paper pattern or just random? and you mean DNH as in DNPH right??
  6. G

    Chemistry, Physics, Biology Paper 3 GUESS

    how do you perform the visking tubing experiment? and the dilutions are like the c1v1=c2v2 wala thing right?
  7. G

    practicals.............

    Kratos, i know ive heard that too... my friend last year got the whole practical before hand but she said it just ended up confusing her even more. but you dont get it, i really need this :( i didnt get a chance to take any tutions so i need to know whats coming in it! and my paper 2 didnt go...
  8. G

    practicals.............

    princesszahra or whoever you are.. pm me. like please!
  9. G

    practicals.............

    Some one please help! i need a guess for chemistry practical 34, and biology 33 and 34! please cause i didnt get a chance to take any tuitions :s
Top