Complete hydrogenation of triacylglycerol C in Problem 23.20 yields a triacylglycerol of what fatty acid composition? Would the hydrogenation product of triacylglycerol C be more like the hydrogenation product of triacylglycerol A or B? Explain.

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Welcome back. Everyone consider the tria glycerol data or three samples of common natural fats and oils. Below. Number one, determine the fatty acid composition of Y after a complete hydrogenation. So essentially we are given a table and we see that there are three samples Xy and Z. And also we notice that we are given the composition for each acid, tic acid, STAIC acid, Oleic acid and linoleic acid. We want to recall that pome acid is essentially ac 16 to 0 acid, which means that it has 16 carbons and no double bonds. It is a saturated acid. Now, sic acid has a form of C 18 to 0. It has 18 carbons and zero double bonds. Now, Oleic acid and linoleic acid, those are also C A assets, but they have double bonds. So we can state that each of them is unsaturated. Specifically, we're looking at a complete hydrogenation of sample Y and essentially hydrogenation is going to occur for those acids that are unsaturated, meaning not polymeric acid, not sic acid, but Oleic acid and linoleic acid. And notice that Oleic acid and linoleic acid, they have 18 carbons. So when those are hydrogenated they will become STAIC acids. So the composition will essentially consist of palmitic acid, which is not going to be affected because it's saturated and the percentage of P metic acid will remain 10.50%. But the percentage of ster acid will increase, we will take the original 3.70% and add the percentage of Oleic acid 73.70%. And also the percentage of linoleic acid, 12.10%. When we add those, we're going to get 89 0.50%. So that's the final composition of why? After a complete hydrogenation, 10.50% of pome acid and 89.50% of sic acid. For the second part of the problem, the question is, would the hydrogenation product of Y be more similar to the hydrogenation product product of X or Z? So we essentially want to calculate the percentages of palmitic acid and STAIC acid for each sample after the complete hydrogenation. So let's look at X and Z or X, we can see the percentage of pome acid that's not going to change 25.40. But for sic acid as a, we're going to essentially add the remaining percentages, we start with 35.70%. Then we add 34.60% and also 4.30%. And we end up with 74.60%. Or Z, the percentage of sic acid is going to become the original 5.20% plus 24.30%. L 57.70%. And when we add those, we get 87.20%. So what we notice is that sample, Y has 89.50% of sic acid, which is quite close to 87.20%. So we can label that. And also when we compare the percentages of palmitic acid, well, essentially sample C has 12.80% and sample, why has 10.50%? Those are relatively close, right? Because the amount of pome acid in sample X is more than twice as large. So we can state that for the second part of the problem, the answer would be sample Z it has a similar composition to the sample. Why after the complete hydrogenation, right? We can see that simply by looking at the percentages of sic acid, 89 and 87. So we have our final answers. Thank you for watching.

Complete hydrogenation of triacylglycerol C in Problem 23.20 yields a triacylglycerol of what fatty acid composition? Would the hydrogenation product of triacylglycerol C be more like the hydrogenation product of triacylglycerol A or B? Explain.

Verified video answer for a similar problem:

Key Concepts

Triacylglycerol Structure

Hydrogenation Process

Comparative Analysis of Triacylglycerols