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31 December, 08:03

0.436 g of an unknown diprotic acid is dissolved in about 60 mL of water in a beaker. The solution is transferred to a 100.00 mL beaker. 25.00 mL of this solution is then transferred to an Erlenmeyer flask for the titration. What mass of the diprotic acid is in the 25.00 mL that is transferred?

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Answers (2)
  1. 31 December, 09:10
    0
    0.182 g

    Explanation:

    0.436 g of the acid was dissolved in 60 mL of water and then transferred into a 100.00 mL beaker. The volume still remains 60 mL.

    25 mL was then transferred to Erlenmeyer flask for titration.

    If 60 mL of the solution contains 0.436 g of the unknown diprotic acid, then 25 mL of the same solution would contain:

    0.436 x 25/60 = 0.182 g

    Hence, the mass of the diprotic acid in the 25.00 mL of the solution is 0.182 g.
  2. 31 December, 10:38
    0
    0.436g
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