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Answer to Question #57310 in Chemistry for panos
Question #57310
what is the type of error (positive or negative) during the calculation of concentration if the following occurs:
during the volumetric analysis of Potassium hydrogen phthalate, a solution of NaOH contaminated with CO2 was used.
during the volumetric analysis of Potassium hydrogen phthalate, a solution of NaOH contaminated with CO2 was used.
Expert's answer
KHC8H4O4 + NaOH → KNaC8H4O4 + H2O
Since, NaOH contaminated with CO2, its concentration lower than supposed, you will received higher concentration value for Potassium hydrogen phthalate than real – positive error.
Since, NaOH contaminated with CO2, its concentration lower than supposed, you will received higher concentration value for Potassium hydrogen phthalate than real – positive error.
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Comments
Dear panos. Yes. The volume of NaOH reacting with KHP is larger.
Since NaOH is contaminated with CO2, its concentration is lowered meaning that the volume of NaOH reacting with KHP is larger?
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