An acid was created in the column containing the Amberlite IR 120 when the salt

An acid was created in the column containing the

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inorganic salt. An acid was created in the column containing the Amberlite IR-120 when the salt (that had been fully dissolved in deionized water was added to the column. The anion (discovered to be Cl - ) was bonded with the H + ions in the resin. When the acidic solution was collected in the beaker it was able to be titrated with .1 M NaOH (a strong base). The moles of NaOH were calculated by multiplying the Liters of NaOH used to titrate the acidic solution (26.6 L and 22.6 L) with the molarity of NaOH (.01 M). This number of moles equated to the number of moles of hydrogen ions. The moles of hydrogen ions equaled the moles of the unknown, inorganic salt. This number of moles was then used with the mass(grams), calculated before the salt was dissolved, to find the molar mass of the salt. This molar mass (g/mol) was then compared with those in the list of salts and the closest one was most likely the salt that was tested. For the experiment conducted above it was discovered the salt was NaCl. There is a slight variation in the actual molar mass of NaCl (58.443 g/mol) and the average molar mass that was calculated (58.172 g/mol). This can be attributed to not collecting the full amount of dissolved salt from the column due to the confusing pH paper that was used. But it is close enough to lead to the conclusion the experiment was done correctly even with the slight error. Ion exchange chromatography is an accurate and precise method of determining the composition of inorganic salts the average calculated molar mass of the unknown, inorganic salt was very close to the actual molar mass of NaCl. In the conductivity measurements portion the compound with conductance 1.2 mS/cm was table salt (NaCl). It was the only compound with any sort of conductance because when sodium chloride (NaCl) is dissolved in water its molecules disassociate into a sodium ion and a chlorine ion. The sodium ion is missing an electron, which gives it a positive charge. The chlorine ion has an extra electron, giving it a negative charge. This gives the solution a positive and negative end to conduct electricity.
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  • Fall '19
  • Sodium, Ion, Sodium chloride, Mustafa Enver

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