LABORATORY DATA AND CALCULATIONS CONDUCTIVITY OF ELECTROLYTE SOLUTIONS Table 8.3
ID: 1024979 • Letter: L
Question
LABORATORY DATA AND CALCULATIONS CONDUCTIVITY OF ELECTROLYTE SOLUTIONS Table 8.3. Recipes for solutions. Solution to be made Stock Solution Reagent, mL Water, ml tured Ethanol Ethanol 10% | 10 0.040M Hydrochloric Acid 2 S 0.020M Hydrochloric Acid20 to loric Acid miCo 0020M Hydrogh 0.008M Hydrochloric Acid 50mL 0.020M Nitric Acid 50mL 0.040M Nitric Acid 2 S 2 S 0.040M Acetic Acid 50mL 2.00M Acetic Acid 0.020M Acetic acid 50mL 0.040M Acetic Acid 2S 2 s 0.020M Potassium Hydroxide0 2 S 0.040M Potassium Chloride 2S 0.040M Potassium Hydroxide 2 S 50mL 0.020M Potassium Chloride 50mL 2 S 0.020M Calcium Chloride 50mL 040M Calcium Caloride 2s 83 Laboratory 8 -Conductivity of Electrolyte SolutionsExplanation / Answer
1.
Ethanol is considered as a covalent molecule. It doesn't contain any ions or as such ions are not forming from ethanol. so denatured ethanol is not showing conductance. But while 20% solution of ethanol is showing conductance because in this solution ethanol undergoes hydrogen bondings with wanter. In the formation of hydrogen bonding partial charge, positive and negative charges produce. this charges causes polarity of the solution and causes the conductance.
2.
Conductivity is one of the good methods to determine the ions present or not in a solution. but in case of determination of the purity of water or other, it is not as much as fruitful because the impurities caused due to a covalnt molecule or unionized molecule will not show conductance.
3.
we can consider deionized water as a very week electrolyte. because very little amount of ionization is occurring.
ethanol as a nonelectrolyte as it a covalent compound
other compound mentioned here, HCL, KOH, CaCl2, KCl, HNO3 etc all are the strong electrolyte. because mostly the compounds are dissociated to respective ions.
4.
at the same concentration of KCl and CaCl2, the conductance is not same. the conductance of the CaCl2 is higher than KCl. now as conductance depends on the number of ions present in the solution. so in the solution of CaCl2, there is one Ca with two positive charge and two Cl ions. but in case of KCl, there is only K +ion and Cl- ion. so CaCl2 have a higher number of ions in solution so it will pass the charges more easily than KCl solution.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.