Chemistry and Biochemistry Academy

Click here to listen to the audio of this article This section is the most demanding part to write. It requires you to prudently think about the results you obtained during the experimental session(s), and relate them to the objectives of the experiment. Besides, it calls for the interpretation and generalization of the results. Therefore, students should relate the experimental results to the scientific knowledge under investigation and the objectives. In some chemistry lab reports especially short lab reports, discussion and conclusion are included in one section. However, in long chemistry lab reports, the discussion and conclusion have their distinctive sections. Let us consider the results (Examples 1 and 2) of the lab report in the previous lesson ( lesson 3 ) to help us write the discussion part of the chemistry lab report. Discussion of example 1: Sodium hydroxide-acetic acid titration curve has a lower initial pH and higher equivalence point as compared t...

Question: A soaper has three types of oils she wants to use in making soap. She wants to make soap with INS factor of 135 and soap which contains 40% of olive oil. She needs your help in calculating the amount of each oil she should use in her soap blend. What are the percentages of palm oil and mutton tallow in her soap blend? Answer: Before you solve this problem you must understand the meaning of INS factor. INS factor is defined as the difference between the iodine number and saponification value. It is crucial in soap making because it helps soapmakers to determine the quality of their soap from the blends of oils. The INS factor varies from 15 to 250. In this question, we know the INS factor (135) of the blend. Besides, we know the percentage (40%) of olive required in the blend. However, we do not know the percentage of palm oil and mutton tallow in the blend, but we know their INS factors (Ongoro, P., 2018, p.g 19). Palm oil has 146 INS factor while mutton tallow h...