Standardization of NaOH.docx - Chandni Patel Chemistry C 126 Lab TA Sheridan Smith 10 October 2017 Standardization of NaOH Introduction Neutralization

Standardization of NaOH.docx - Chandni Patel Chemistry C...

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Chandni Patel Chemistry C- 126 Lab TA: Sheridan Smith 10 October 2017 Standardization of NaOH Introduction: Neutralization reaction is also known as an acid-base reaction. This net ionic equation proves the neutralization reaction, in this reaction the acid and base react to form water and a salt. This reaction is general form of an acid-base reaction: H 3 O + (aq) + OH - (aq) 2H 2 O(l) Standardization is where it is accurately knowing the reactant’s concentration or mass, which can also be used to determine the unknown concentration of the other reactant. Since the reaction is a one to one mole basis, the number of moles of sodium hydroxide (NaOH) can be calculated and can be used in other calculations. The balanced equation between NaOH and KHP is: KHC 8 H 4 O 4 (aq) + NaOH(aq) KNaC 8 H 4 O 4 (aq) + H 2 O(l) In this experiment potassium hydrogen phthalate (KHP) is used as the acid. In this case the KHP is a solid acid that can be weighed as precisely to three or four decimal places. Titration is used to control the progress of the reaction and to establish when it is complete. Titration is also able to control the addition of one react to another reactant. There is also has to a technique to figure out when the limiting reagent has been used up. The two techniques are using a buret and an indicator. A buret is used to add the identified volume from one reactant to another. An indicator is used to decide the endpoint of the reaction. The purpose of this lab was to calculate the concentration of NaOH solution versus KHP. The purity of the unknown KHP sample was determined.
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  • Spring '18
  • Sodium hydroxide, KHP

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