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ID: 972616 • Letter: H
Question
home / study / science / chemistry / questions and answers / a saturated solution of sodium bitartrate (nac4h5o6) ... Question A saturated solution of sodium bitartrate (NaC4H5O6) is prepared by adding 2 g of NaC4H5O6 to 50.00 mL of 0.200 M NaCl solution. A 20.00 mL sample of the saturated NaC4H5O6 solution was diluted with 25 mL of distilled water then titrated to a phenolphthalein end point by the addition of 16.55 mL of 0.0500 M NaOH. Given the titration reaction below, how many moles of C4H5O6- were in the 20.00 mL sample of solution? C4H5O6-(aq) + OH-(aq) --> H2O(l) + C4H4O62-(aq) What was the concentration of C4H5O6- in the 20.00 mL sample of the saturated solution? What was the concentration of sodium ions (Na+) in the saturated solution? What is the Ksp of sodium bitartrate?
Explanation / Answer
0.01655 L X 0.050 mol/L = 8.28X10^-4 mol NaOH used.
In the titration of sodium bitartrate with NaOH, there is a 1:1 ratio between NaOH and the bitartrate. So, the 20 mL sample contained 8.28X10^-4 moles of sodium bitartrate.
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