When titrating 25 mL of an approximately 0.1 M solution of a triprotic acid solution with 0.1052 M NaOH, a student calculates that the end point will be reached after the addition of approximately x mL of NaOH. However, after the addition of 2x mL of sodium hydroxide, no colour change is observed. Which of the following errors could not account for this obervation? using a 3 mole acid : 1 mole base ratio in the calculation washing the sides of the flask with DI water during the titration and diluting the analyte solution mistakenly using a 0.01000 M NaOH solution in the titration failing to add an indicator to the analyte solution mistakenly using a primary standard solution of > 1.0 M in the titration
When titrating 25 mL of an approximately 0.1 M solution of a triprotic acid solution with 0.1052 M NaOH, a student calculates that the end point will be reached after the addition of approximately x mL of NaOH.
However, after the addition of 2x mL of sodium hydroxide, no colour change is observed. Which of the following errors could not account for this obervation?
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using a 3 mole acid : 1 mole base ratio in the calculation |
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washing the sides of the flask with DI water during the titration and diluting the analyte solution |
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mistakenly using a 0.01000 M NaOH solution in the titration |
||
|
failing to add an indicator to the analyte solution |
||
|
mistakenly using a primary standard solution of > 1.0 M in the titration |
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