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zaphod Group Title

25 cm^3 of 2mol/dm^3 Sodium hydrixude solution and 25cm^3 of 2 mol/dm^3 Sulphuric acid were mixed well to make a solution X. Calculate the concentration of Sulphuric acid in the final solution..

  • 2 years ago
  • 2 years ago

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  1. zaphod Group Title
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    @Callisto @TuringTest

    • 2 years ago
  2. Callisto Group Title
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    Sodium hydroxide?

    • 2 years ago
  3. zaphod Group Title
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    h2so4?

    • 2 years ago
  4. Callisto Group Title
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    Do you mean sodium hydroxide for ''Sodium hydrixude''?

    • 2 years ago
  5. zaphod Group Title
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    yh

    • 2 years ago
  6. Callisto Group Title
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    Can you write the chemical equation for the reaction first?

    • 2 years ago
  7. zaphod Group Title
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    2NaOH + H2SO4 ---> Na2SO4 + 2H20

    • 2 years ago
  8. Callisto Group Title
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    In this reaction, what is the limiting agent?

    • 2 years ago
  9. zaphod Group Title
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    limiting agent means? i found the answer it is 1 moldm^-3 cn u check it

    • 2 years ago
  10. Callisto Group Title
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    Hmm, I didn't get the same answer as you.

    • 2 years ago
  11. zaphod Group Title
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    can u shw ur working

    • 2 years ago
  12. Callisto Group Title
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    Perhaps I didn't do it correctly, since I haven't studied chemistry for quite a long time.. No. of mole of H2SO4 used = 1/2 (no. of mole of NaOH) = (1/2) (2x25/1000) = x *NaOH is the limiting agent that will be used up in the reaction. No. of mole of H2SO4 left = no. of mole of H2SO4 - no. of mole of H2SO4 used = (2x25/1000) - x = y Concentration of H2SO4 in the final solution = no. of mole of H2SO4 left / volume of the solution. And I take volume of the solution remains unchange, that is 25cm^3 + 25cm^3 = 50cm^3 Did I do anything wrong?

    • 2 years ago
  13. zaphod Group Title
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    This is how i did, check if im wrong 2NaOH + H2SO4 ---> Na2So4 +2 H20 the molar ratio is tht, 2 moles of NAOH reacts with 1 mole of H2so4 when u calculate the number of moles in each reactnt it is 0.05 mole, which means 0.05 mol of Naoh react with 0.025 mol of H2so4...so there is 0.025 mole of H2so4 left n = c*v/ 1000 0.025 = c * 25/1000 c = 1 mol dm^-3

    • 2 years ago
  14. Callisto Group Title
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    Why is it 25cm^3 for your volume?

    • 2 years ago
  15. zaphod Group Title
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    should it be 50 or 25?

    • 2 years ago
  16. zaphod Group Title
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    im not sure of this

    • 2 years ago
  17. Callisto Group Title
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    Hmm.. final solution, it's not just the volume of H2SO4, so I prefer using the total volume. But I'm not sure though. As I've said, I haven't studied chemistry for quite a long time!

    • 2 years ago
  18. zaphod Group Title
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    then the answer becomes 0.5 moldm^-3

    • 2 years ago
  19. Callisto Group Title
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    That's what I got. Sorry for the late reply

    • 2 years ago
  20. zaphod Group Title
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    so my method is right?

    • 2 years ago
  21. Callisto Group Title
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    The method is right, just the volume is not right/

    • 2 years ago
  22. zaphod Group Title
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    thanks alot :)

    • 2 years ago
  23. Callisto Group Title
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    Welcome :)

    • 2 years ago
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