2. Describe and explain the possible effect on your results of the following exp

Question

2. Describe and explain the possible effect on your results of the following experimental errors or variations. (a) The reaction test tube contained water. (b) You heated the oil with methanolic sodium hydroxide but forgot to add the boron trifluoride/methanol solution.

Background Info: Added 50mg cooking oil w/ 1.7mL of .5M NaOH in methanol, boiled in hot water bath 3-5 min. Added 2.0mL of 12.5% boron trifluoride in methanol - boiled 2 min. Separated using 4mL saturated aqueous sodium chloride & petroleum ether. Dried with sodium sulfate and evaporated off solvent.

Explanation / Answer

1. As you added oil and water it won't be soluble.

2. As you forgot to add trifluoride/methanol the oil will saponificate

3. The sodium sulfate won't be separated as the reaction does not happen.

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