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anonymous

  • one year ago

Which solution could you prepare by dilution? A. 400 milliliters of 2.50 molar solution from a 2.00 molar stock solution B. 600 milliliters of 3.00 molar solution from a 2.50 molar stock solution C. 700 milliliters of 4.50 molar solution from a 3.00 molar stock solution D. 900 milliliters of 3.50 molar solution from a 4.50 molar stock solution Please help me understand this question. :)

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  1. Vocaloid
    • one year ago
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    hint: when we dilute, the molarity of the prepared solution is lower than the molarity of the stock solution

  2. Vocaloid
    • one year ago
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    so, look at each answer choice to see which one has a higher stock solution molarity than the prepared molarity

  3. anonymous
    • one year ago
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    Ok

  4. anonymous
    • one year ago
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    What's the difference between the molar solution and the molar stock solution? And how do you find the molarity?

  5. anonymous
    • one year ago
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    That's where I get confused

  6. Vocaloid
    • one year ago
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    molarity is given in the problem

  7. Vocaloid
    • one year ago
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    ok, maybe I can explain it this way the "stock solution" is a solution with a known concentration, and the "prepared solution" is a new solution that we make by taking part of the stock solution and adding water

  8. anonymous
    • one year ago
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    Ohh ok

  9. Vocaloid
    • one year ago
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    so, let's take a look at the first answer choice: A. 400 milliliters of 2.50 molar solution from a 2.00 molar stock solution this means, we take a 2.00 molar stock solution, and we try to make a new solution that is 400 ml and 2.50 molar now, going by the rule I stated earlier, the stock solution molarity has to be higher than the new solution 2.00 molar stock is less than 2.50 molar solution so A cannot be our answer

  10. Vocaloid
    • one year ago
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    keep going like this until you find the answer

  11. anonymous
    • one year ago
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    Thank you so much for explaining :)

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