HV?. Solid methyl cinnamate is (basic/ acidic/ neutral)? Solid trans-cinnamic ac
ID: 1044192 • Letter: H
Question
HV?. Solid methyl cinnamate is (basic/ acidic/ neutral)? Solid trans-cinnamic acid is (basic/ acidic/ neutral)?. If you could not perform an FT-IR, GC-MS, or H' NMR, what two things could you do in the lab to validate the presence of the product upon isolation given that both the starting material and product are white solids? 2. HW2. A wash removes undesired materials from the phase the product is in to another phase. An extraction removes the desired product from one phase to another phase. So moving an unwanted material out of a phase is a wash and moving a desired material out of a phase is an extraction. Complete the following sentences: a. The first use of 3 x 15 mL of diethyl ether (expt. step 3) was labeled a wash because: b. The second use of 3 x 15 mL of diethyl ether (expt. step 9) was labeled an extraction because: HW3. What was the overall yield of making trans-cinnamic acid starting from benzaldehyde (2 steps)? Show your work below:Explanation / Answer
a) methyl cinnamate is an ester hence it is neutral in solid phase.
trans cinnamic acid is a carboxylic acid and is acidic.
b) 1) we can distinguish the two by solubility in NaHCO3, as cinnamic acid will show solubility while methyl cinnamate will be insoluble
2) also, the melting point can be used to distinguish. The two have different melting points
ii) in the first case we have used diethyl ether for removal of impurity hence it will called as wash while in second case we are using it for purification of the product from the solution or crystallization hence it is extraction
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