Further re-evaluated method

Procedure-

NaCl in water:

1) 135mL of water was poured into a 250mL beaker. 35.7g of sodium chloride was weighed in a beaker upon the electronic scales and added to the water. The solution was stirred until dissolved.

2) After protective bench paper had been laid across the workspace and safety equipment collected the titration apparatus was set up. The burette clamp was fastened to the retort stand, along with the burette after it had been rinsed through with both distilled water and silver nitrate.  

3) The burette was filled with silver nitrate, and 10mL of the saturated NaCl solution with three drops of the potassium dichromate indicator was placed in a conical flask beneath the apparatus.

4) The silver nitrate was slowly titrated into the salt solution until a brick red precipitate was formed. The number of moles of silver nitrate used was then calculated to determine the chloride ion concentration and consequently the solubility product of the salt.

5) The above procedure was then repeated; however, the sodium chloride solution was heated to 50 degrees Celsius, before 10mL was measured out for the titration.  

NaCl in ethanol:

6) A known amount of salt, in this instance 35.7g, was placed into 135mL of ethanol.  The solution was stirred for approximately three minutes. In order to determine how much of the sodium chloride was dissolved, the solution was filtered through filter paper.

7) When the filter paper was dry, the amount of salt present on the filter paper was weighed and comparisons made to the original amount of salt placed in the ethanol. Both weights were recorded.

8) The ethanol and salt solution was titrated with silver nitrate to determine the amount of chloride ions according to the same procedure as the NaCl and water solution. The solubility product was then calculated of salt in ethanol.

9) The same procedure for ethanol was repeated, though over a heat of 50 degrees celcius before the addition of NaCl.

NaCl in Oil:

10) A known amount of salt (in this case, 35.7g) was added to weighed flask containing 135mL of olive oil and mixed well. 100mL of distilled water was added to the solution and stirred for approximately three minutes.

11) Using a separating funnel, the water was filtered off, leaving only the olive oil. This liquid was weighed in order to determine whether any of the NaCl had been dissolved into the oil. If the weight was changed, then a titration was used to determine the chloride concentration. If not, no titration was used due to the absence of any chloride ions.

12) Regardless of whether or not any sodium chloride dissolved, the test was repeated over a heat of 50 degrees Celsius before the water was added to the oil and salt.