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bugsey7 Group Title

If it requires 18.2 milliliters of 0.45 molar barium hydroxide to neutralize 38.5 milliliters of nitric acid, solve for the molarity of the nitric acid solution. Show all of the work used to solve this problem. Unbalanced equation: Ba(OH)2 + HNO3 yields Ba(NO3)2 + H2O I need help with this (: thanks!

  • 2 years ago
  • 2 years ago

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  1. apoorvk Group Title
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    Okay, so balance this first, we shall! \[\huge Ba(OH)_{2} + 2HNO _{3} -> Ba(NO _{3})_{2} +2 H _{2} O\]

    • 2 years ago
  2. apoorvk Group Title
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    now, 18.2 ml of 0.45M barium hydroxide means, 0.0081 moles of it. Now this is being used for some 'x' moles of of nitric acid. according to the balanced equation above, the no. of moles of nitric acid required is 2 times that of barium hydroxide. so, that means, we neutralised a total of 2*0.0081 moles of nitric acid. so, that means the solution contained 2*0.0081 moles of nitric acid, that is 0.0162 moles, in 38.5 ml of solution of it. so, you know now, 0.0.162 moles in --> 38.5ml of the solution. Can you try to find the molarity now?

    • 2 years ago
  3. bugsey7 Group Title
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    I think so, I'll try, thank you.

    • 2 years ago
  4. apoorvk Group Title
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    Okay, post your answer, if you need to verify. :)

    • 2 years ago
  5. bugsey7 Group Title
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    Okay, I will (:

    • 2 years ago
  6. bugsey7 Group Title
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    I have a feeling I did it wrong, but is it 0.210 M ?

    • 2 years ago
  7. bugsey7 Group Title
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    I think I plugged in a wrong number O: Ooopsies!

    • 2 years ago
  8. bugsey7 Group Title
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    easy fix though o.O Maybe

    • 2 years ago
  9. apoorvk Group Title
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    Uh-oh. the answer should be just the double of that. Molarity ---> moles of solute per litre of the solution Okay, you must have plugged in, 0.081 right? yeah easy fix. :)

    • 2 years ago
  10. bugsey7 Group Title
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    Should it be 0.420?

    • 2 years ago
  11. bugsey7 Group Title
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    :D yay! I am glad I did it right other than that one mistake! Thank you so much ^__^

    • 2 years ago
  12. apoorvk Group Title
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    No problems! =]

    • 2 years ago
  13. prowrestler Group Title
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    hey @lowcard2

    • 5 months ago
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