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owlet

  • one year ago

A solution is prepared by mixing 50mL of 0.100 HCL and 10 mL of 0.200M NaCl. What is the molarity of chloride ion in this solution? I'm a slow learner so.. I need a step by step guide on how to do this please..

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  1. owlet
    • one year ago
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    @Rushwr

  2. Rushwr
    • one year ago
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    Do u know what molarity is ?

  3. owlet
    • one year ago
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    yes, isn't it equal to mol/L?

  4. Rushwr
    • one year ago
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    Molarity = moles of solute / volume of the whole solution

  5. Rushwr
    • one year ago
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    yeah exactly !!!!

  6. owlet
    • one year ago
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    ok.. that is what I have to find out for Cl- what i did so far is do the chemical equation,which i'm not sure if right,, NaCl + HCl -> Na+ + H+ + Cl-

  7. owlet
    • one year ago
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    volume of the whole solution so should I add the 0.01 and 0.05?

  8. Rushwr
    • one year ago
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    We are asked to find the molarity of Cl^- ions right? For that we need to find the total moles of Cl^-1 ions. We get Cl^-1 ions from the solutions right? \[NaCl --------> Na ^{+ } + Cl ^{-1}\] \[HCl--------> H ^{+} + Cl ^{-}\] Yeah to find the total volume u have to add up 0.01 and 0.05

  9. owlet
    • one year ago
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    yes, right. total volume will be 0.06L..then what?

  10. Rushwr
    • one year ago
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    yeah now we have to find the total moles of Cl^- ions in both the solution

  11. owlet
    • one year ago
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    i need to use the value of the given molarities right? so will it be in NaCl: 0.200 x 0.01?

  12. owlet
    • one year ago
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    for HCl: 0.100 x 0.05?

  13. Rushwr
    • one year ago
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    yp

  14. Rushwr
    • one year ago
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    now u have to add up the moles from both solutions and put it on the molarity equation

  15. owlet
    • one year ago
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    okay... so total volume: 0.06 #of moles of Cl= (0.200 x 0.01) + (0.05 x 0.100) = 0.007 so 0.06/0.007 which is equal to 0.12 M?

  16. Rushwr
    • one year ago
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    moles divided by the volume not the other way round !!!!

  17. owlet
    • one year ago
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    oh yeah, i typed it wrong sorry lol I put 0.007/0.06 on my paper it's right i think :D the book says 0.117

  18. Rushwr
    • one year ago
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    yp yp that's the answer :)

  19. owlet
    • one year ago
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    thank you :)

  20. Rushwr
    • one year ago
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    no problem :)

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