The molecular weight of the substance and the identity of the unknown can then

The molecular weight of the substance and the

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determine the number of moles present in the sample. The molecular weight of the substance and the identity of the unknown can then be determined based on the number of moles and the weight of the sample. 2) Calculations Experiment Round 1: Salt 1- 0.1536g Final Buret Level-32.8 mL -Initial Buret Level-6.2 mL ---------------------------------------------- Total liquid used to titrate: 26.6 mL NaOH Molarity (moles/L) * Volume (L)= moles .1 M (moles/L) NaOH * .0266 L NaOH = .00266 moles of NaOH .00266 moles of NaOH= .00266 moles of H + = .00266 moles of unknown salt. Calculation of molar mass of unknown: .1536 g unknown/ .00266 mol of unkown= 57.744 g/mol unknown
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Lab work Mustafa Enver TA: Lexie Koziel Sept 23, 2019 Experiment Round 2: Salt 1- 0.1524g Final Buret Level-24 mL -Initial Buret Level-1.4 mL ---------------------------------------------- Total liquid used to titrate: 22.6 mL NaOH Molarity (moles/L) * Volume (L)= moles .1 M (moles/L) NaOH * .0226 L NaOH = .00226 moles of NaOH .00226 moles of NaOH= .00226 moles of H + = .00226 moles of unknown salt. Calculation of molar mass of unknown: .1524 g unknown/ .00226 mol of unkown = 58.6 g/mol unknown Average molar mass of two trials: (58.6 + 57.744) g/mol unkown = 58.172 g/mol of unkown Na-22.990 g/mol +Cl- 35.453 g/mol ------------------------- NaCl-58.443 g/mol The closest molar mass to one calculated is NaCl.
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Lab work Mustafa Enver TA: Lexie Koziel Sept 23, 2019 3) Discussion and conclusion Ion-exchange chromatography can be used to discover the composition of an unknown inorganic salt. An acid was created in the column containing the Amberlite IR-120 when the salt
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  • Fall '19
  • Sodium, Ion, Sodium chloride, Mustafa Enver

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