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A 10.00-mL sample of HCI solution was transferred to an Erlenmeyer flask and diluted by adding about 40 mL of distilled water. Phenolphthalein indicator was added, and the solution was titrated with 0.
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A 10.00-mL sample of HCI solution was transferred to an Erlenmeyer flask and diluted by adding about 40 mL of distilled water. Phenolphthalein indicator was added, and the solution was titrated with 0.215 M NaOH until the indicator just turned pink. The exact volume of NaOH required was 22.75 mL. Calculate the concentration of HCI in the original 10.00-mL sample.

User Ebrahim Byagowi
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1 Answer

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Use Relationship between C and V

  • C1V1=C2V2
  • (40-10)C1=22.75(0.215)
  • 30C1=4.9
  • C1=4.9/30
  • C1=0.1634M
User Martin M J
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