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minnie123

  • 3 years ago

Calculate the molarity of the solution. 29 g of NaCl (g.f.w. = 58.5 g/mol) in 0.030 liters. 0.015 M 17 M 67 M

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  1. afa92
    • 3 years ago
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    First you want to find the moles of 29g of NaCl. Then you can plug it into the equation for molarity which is moles of solute/liter of solution.

  2. minnie123
    • 3 years ago
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    how do you do that???

  3. afa92
    • 3 years ago
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    Find the moles of NaCl?

  4. minnie123
    • 3 years ago
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    How do you do that?!?

  5. afa92
    • 3 years ago
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    29 g of Nacl * molar mass of NaCl= answer

  6. aussy123
    • 3 years ago
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    I think she needs you to set it up in a equation

  7. afa92
    • 3 years ago
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    I just did.

  8. afa92
    • 3 years ago
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    Then you take that answer and put it over the liters of solution.

  9. minnie123
    • 3 years ago
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    this is my question.... how would you find the molar mass of NaCl?

  10. afa92
    • 3 years ago
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    The molar mass is the sum of the atomic mass' of the Na+Cl

  11. afa92
    • 3 years ago
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    which is X grams/moles

  12. aussy123
    • 3 years ago
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    moles = given wt/mol. Wt Mol.wt of nacl=23+35.5=58.5 gm Moles = 29/58.5 = 0.495 = 0.5 moles (approx)

  13. minnie123
    • 3 years ago
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    ok... i got the molar mass as 58.442 so will i do 29 * 58.442

  14. minnie123
    • 3 years ago
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    @aussy123 you've got something a little wrong there hun

  15. aussy123
    • 3 years ago
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    Oh sorry I missed 0.015M

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