The purpose of this lab is to attempt to verify two of the three important chemical laws, The law of conservation of mass, The law of definite proportions, and the law of multiple proportions. The laws are verified through observation of the reaction between iodine and zinc. This lab also helps to hone laboratory and massing skills. this lab includes both qualitative observation and quantitative gravimetric data. Background Questions 1. For each of the three important chemical laws, briefly explain
Yield of a Single Displacement Reaction Purpose: To determine the % of yield of the reaction of copper sulphate and iron with water, in order to learn to use and apply theoretical and actual yield into real life scenarios. Hypothesis: I believe that the mass of the actual yield will be lower than the mass of the theoretical yield because of the decanting. This process can make the precipitate leave the beaker and fall into the sink. Procedure: Refer to handout Lab: Finding the % of Yield of a Single
also used as pesticide. When mixed with glue, it undergoes a transformation into a substance called slime. This is caused by a chemical reaction in the compound. Borax in water causes an ion called borate ion to form. Mixed with glue, the borate ion and the glue solution link, forming slime. This is a chemical change, causing a new substance to form. It also has chemical energy because it has the potential to change chemically. It does not have the properties for a physical change, and it is also
information: Enzymes are biological catalysts that can speed up chemical reactions and lower the activation energy. For example, lactase is an enzyme that speeds up the hydrolysis reaction of breaking up lactose and lowers its activation energy. Lactase breaks lactose into its two monosaccharides, glucose and galactose; both 6-sided monosaccharides. Lactose is a sugar found in milk as well as many other dairy products and is the substrate in the reaction. To digest lactose, the lactase enzyme reduces the energy
Title of PhD research proposal: Morphological and Molecular Characterization, Micropropagation and nutritional assessment of cocoyam (Xanthosoma sagittifolium (L.) Schott) germplasms from Ethiopia By: Eyasu Wada Wachamo Email: eyasuwada@yahoo.com Phone number (Mobile): 251 912 841 769 Skype name: eyasu.wada1 Applied Genetics PhD student, Department of Microbial, Cellular and Moleulr Biology, Addis Ababa University 1. Introduction Cocoyam (Xanthosoma sagittifolium L. Schott) is herbaceous, perennial