Chemical Reactions and Quantification Quiz

The evidence of the reaction is the observation that adding more HCl results in requiring less, indicating that some of the KOH is consumed by the fat solution.

The calculation for the quantification value Q is Q = B - C, where B is the blank and C is the test solution. Since B is greater than C, the result is multiplied by the normality and molecular weight of the KOH solution divided by the weight of the fat (1 gram in this experiment). This gives the milligrams of KOH required to neutralize the fatty acids present in the fat solution per gram of fat.

The calculated amount of KOH consumed per gram of fat is 6.9 mg, given the normality of the KOH solution is 0.1 and the molecular weight of the KOH solution is 56.1.

<p>Fatty acids are long chains of hydrocarbons with a carboxylic acid group at one end. They exist in two forms: free fatty acids and combined fatty acids.</p> Signup and view all the answers

<p>The viva questions aim to test the understanding of the experiment, including the nature of fatty acids, the quantification value calculation, and the interpretation of the results obtained from the experiment.</p> Signup and view all the answers

<p>The purpose of adding more HCl is to neutralize any remaining KOH in the fat solution. The observed result of requiring less HCl after adding more indicates that some of the KOH is consumed by the fat solution. This indicates that KOH reacts with the fat solution.</p> Signup and view all the answers

<p>The calculation for the quantification value is Q = B - C, where B is the blank solution and C is the test solution. By multiplying the result by the normality of the KOH solution and the molecular weight of the KOH solution divided by the weight of the fat (1 gram in this experiment), the amount of KOH consumed per gram of fat can be determined.</p> Signup and view all the answers

<p>Fatty acids are represented by the formula RCOOH, where R is the bulky group. They exist in both free and combined forms in the fat solution in the experiment.</p> Signup and view all the answers

<p>The normality of the KOH solution and its molecular weight are used in the calculation to determine the amount of KOH consumed per gram of fat. These values are essential for converting the quantification value into the amount of KOH consumed.</p> Signup and view all the answers

<p>In this experiment, the amount of KOH consumed per gram of fat is calculated by using the formula B - C = 6.9, the normality of the KOH solution is 0.1, and the molecular weight of the KOH solution is 56.1. Dividing this by 1 gram gives us the amount of KOH consumed per gram of fat.</p> Signup and view all the answers