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  1. X

    Paper 5 Tips !! :)

    C-B= mass of oxygen C-A= mass of Cu for 1st row 0.6g oxygen --> gives 1.56Cu 1g Oxygen---> x use unitry baba
  2. X

    Paper 5 Tips !! :)

    JazakAllah!!
  3. X

    Paper 5 Tips !! :)

    part 1e or 2e
  4. X

    Paper 5 Tips !! :)

    for d part: it means higher mass are not seen to give expected results, either they are lower means more CuO is supposed to be more than it is means some CuO is blown out if higher incomplete decomposition! for f pick any point of your x-axis draw a line from that point to the line of best fit...
  5. X

    Paper 5 Tips !! :)

    n line of best fit means lines passing to most of the points it can be a straight line it can be curve it can pass through an origin but not neccessary though!
  6. X

    Paper 5 Tips !! :)

    y our question is to general.. but here's the part temp increases solubility increases due to successfull collisions masses of solution is brought stuff fact (we assume vol of solvent(liq part) is its mass too)
  7. X

    Paper 5 Tips !! :)

    y yup it will be in the tube after decomposition i guess u take it into beaker
  8. X

    Paper 5 Tips !! :)

    in water bath coz u cant measure temp in an opaque solution!
  9. X

    Paper 5 Tips !! :)

    solubility cant be above 100g because here we calculating solubility in 100g of water u might have did something wrong what are your column headings??
  10. X

    Chemistry: Post your doubts here!

    what is the relation between the rate and heat loss?? rate is the measure of time to complete the reaction and heat loss is heat loss..
  11. X

    Paper 5 Tips !! :)

    All Awesome Credit goes too knowitall10 i simply asked knowitall10 here's the response: Yep thats right, the question came in my mock exam in school, i labelled the stauration point by drawing the dotted line downwards the way you have, but i didnt mark the moles of copper sulfate, and i still...
  12. X

    Paper 5 Tips !! :)

    probably yes it can vary(the more the temp more AvgKE of Particles more quickly efficient collisions) but the temp @ which dissolving is happening must be constant
  13. X

    Chemistry: Post your doubts here!

    Or do experiment in a thermostatically controlled room or keep the temp of the solutions constant using thermostatically controlled water bath**!
  14. X

    Paper 5 Tips !! :)

    buddy i haven't attempted this paper yet, but definately In Sha Allah tommorow i am going to master this paper proActively! till then rest :)
  15. X

    Paper 5 Tips !! :)

    actually u have to evaporate the water from saturated solution then allow it to cool to get the crystals and these crystals are initself the mass dissolved(P.S u must use all of the saturated solution to get the mass dissolved)! when u substracts the mass of crystal from the initial mass, u...
  16. X

    Paper 5 Tips !! :)

    np, feel free to ask :) repeat until constant mass is acheived repeat the experiments until constant mass of residue is achieved!
  17. X

    Paper 5 Tips !! :)

    Method of Cie to calculate solubility -make a saturated solution add the solid to water at a particular temperature until no more dissolves. Then add more solid and leave the mixture in a thermostatically controlled water bath to establish equilibrium. • Prepare a saturated solution at a...
  18. X

    Paper 5 Tips !! :)

    for solubility => u need mass of solid dissolved and mass of water in which it is dissolved so mass of solid = D-B mass of water = C-D use formula Solubility = (mass of solidx100) / mass of water for a better understanding of solubility see older post ! hope it helps
  19. X

    Paper 5 Tips !! :)

    Another and more known Method to calculate solubility of a compound in water(lol try it in your own kitchen) Solubility refers to highest amount of a dissolvable substance, also known as a solute, that can actually be dissolved in a given dissolving substance, also known as a solvent. In terms...
  20. X

    Paper 5 Tips !! :)

    Their would be to lines one at higher temperatures (solubility temperature) and the other at lower temperature (crystals appearing) on x-axis Temperatures and on Y-axis Solubility u extend both of these lines and the point of intersection is their transition temperature!
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