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anonymous

  • one year ago

In order to make 100 mL of a 0.512 M NaCl solution, then _________ g of NaCl is needed.

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  1. taramgrant0543664
    • one year ago
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    The formula is m=cv Where m is the mass that you are determining, c is the concentration in this case 0.512M and v is volume (note volume is in litres so you would have to convert it)

  2. anonymous
    • one year ago
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    so is it 2.99g ?

  3. taramgrant0543664
    • one year ago
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    100mL=0.1L m=cv =(.512)(.1) =0.0512g

  4. anonymous
    • one year ago
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    but we're trying to make a 100mL solution of 0.512g how is the answer the same as the number in the question with one more 0???

  5. anonymous
    • one year ago
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    0.512M*

  6. taramgrant0543664
    • one year ago
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    Because it's 100mL solution (or 0.1L) it would change more if it was at a different volume like if it was at 200mL you would have 0.102g of NaCl in it

  7. anonymous
    • one year ago
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    So is the answer 2.99?

  8. anonymous
    • one year ago
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    What I did was (0.1L x 58.4 x 0.512) because there is 58.4 g/mol in NaCl

  9. taramgrant0543664
    • one year ago
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    You don't need to put the molar mass in at all Let's say if you did put in 2.99g of NaCl c=m/v =2.99/0.1 =29.9 as your concentration

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