Experiment 1 Preparation Of Standard Solutions And

EXPERIMENT 1 PREPARATION OF STANDARD SOLUTIONS AND THE DETERMINATION OF THE eq lading OF AN UNKNOWN SOLID ACID Purpose of prove: The principle impersonal of this experiment is to determine the preoccupation of NaOH and HCl and to coiffure standard NaOH and HCl for custom in future experiments. NaOH will be standardized against samples of kelvin hydrogen phthalate. Concentration of HCl will be determined by using standardized NaOH. Other objectives imply determination of tantamount(predicate) weight of an unknown solid venereal disease, acquisition/ reintroducing the physical techniques of dilution and titrating to an exponent end point, to work with equivalents, and basic statistics for coverage experimental results. chemical substance and/or Biochemical screen background: Structures Sodium hydrated oxide (NaOH) Hydrochloric acrid (HCl) [pic] [pic] cat valium Hydrogen Phthalate (KHP) Phenolphthalein (an indicant) [pic] [pic] Dilution of NaOH: NaOH + weewee ( Na+ + OH- + H2O The equation shows ionization of sodium hydroxide in water. Dis etymon of NaOH is highly exothermic. standardisation of NaOH solution against Potassium acid phthalate (KHP): NaOH + KHC8O4H4 ? KNaC8O4H4 + H2O Potassium acid Phthalate (weak acid) reacts with OH- from NaOH forming water, and solution is neutralized. therefore the solution turns into pink shown by phenolphthalein, a pH indicator changes its color into pink in pH fly the hencoop of 8.2-10.0. Dilution of HCl: HCl + H2O ( H+ + Cl- + H2O The equation shows ionization of hydrochloric acid in water. Standardization of HCl solution against standardized NaOH: NaOH + HCl ? NaCl + H2O Hydroxide ion of known conce ntration reacts with acid from hydrochloric ! acid and forms water and salts. rule: Preparation of 0.1N NaOH: agitate about 30g sample of NaOH pellets using an...If you wishing to get a full essay, order it on our website: BestEssayCheap.com

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