Chemical substance

and insoluble formed different colors of precipitate. The main importance in finding the nine unknown solutions was to prevent any inaccuracies that might form when there is a chemical compound forming. This experiment was done to determine the identity of the nine unknown solutions like color (physical trait), and chemical characteristics. Of course to determine the identity of this nine unknown solutions a sequence of solubility tests…

Abstract: The melting point ranges for the substances Tartaric Acid, Acetaminophen, and Phenacetin, which are in powder form and white in color, was found and compared to their literature values to find their purity. The melting point range of a 9:1 mixture of Phenacetin and Tartaric acid was later found to show the effect an impure substance has on temperature. Melting point range for unknown three that was lastly tested was matched to Acetaminophen by comparing their melting points.…

Kitty Hach – Darrow was a mother. Chemical entrepreneur marketing trailblazer and pilot. She started college at Iowa state university to become a home economics teacher but was inspired by a chemist in the department who lead many young women into chemical profession. Another influence in to her chemical profession was her soon to be husband Cliff Hach. Water purifying has come a long way since Kitty’s discovery; we now have water filters and plants that filter water for us. Also we have…

The hypothesis was that unknown was calcium chloride. This conclusion came from a couple of sources of reasoning. First, a number of compounds were present in the lab, and one of those had to be the unknown. Second, the unknown was white and spherical in shape, and so these characteristics were examined for in the possible compounds. Compounds that were sand-like in texture or liquid in their present physical state were passed over since none of those compounds could be the unknown. Calcium…

The manufacturers of sealants typically ship their products as a powder, and contractors prepare the liquid sealcoating as it is needed to complete jobs. The mixture requires adding water, additives and sand in the correct proportions if the sealant is to perform as it should. Although some people believe that sand is merely a filler that is added to reduce the amount of dry sealant needed, nothing could be further from the truth. Sand Provides Important Safety Features Sealcoating without…

The chemical differences between the substances water and oil are immiscible- meaning that they will not mix together. This also describes the relationship that I have with writing. Throughout my previous thirteen years of schooling I have encountered multiple teachers that have focused solely on the format in which is paper is written rather than the content that is found in a paper. The only time any of my teachers ever focused on content and grammar of our papers was not until they graded…

1. Distinguish between a chemical change and a physical change. Illustrate each using several examples. A physical change does not change the substance of the matter the identity does not change. A chemical change produces a new substance and absorbs or liberated heat. Chemical changes produce an indication of chemical change substances combine chemically producing new substances that cannot separated by physical means. Examples of physical changes: Dissolving salt in water is a physical…

responsible for the high temperature change in the overall reaction. After doing a control experiment with Sodium Bicarbonate and phenol red and noticing that the temperature got colder, only one other chemical mixed with phenol red could be responsible for the warm temperature change that chemical being Calcium Chloride. There was a temperature change that was observed during the individual control labs as seen when calcium chloride was mixed with water it became hotter and when calcium…

A chemical reaction is a process in which one or more substances, which are the reactants, are converted to one or more different substances, which are the products. The substances in a chemical reaction are either chemical elements or compounds. There are different observations that indicate a chemical reaction has taken place. Formation of precipitate, which is a solid formed in a chemical reaction. Precipitate can take place when solutions containing ionic compounds are mixed and an insoluble…

of this unity was to learn how new substances formed and what happened when they are formed. Some of the key ideas addressed in this unit are: chemical and physical reactions, the law of conservation of mass, and ionic/covalent bonding. In a chemical reaction, something new is created, different from what created it, a new substance is formed. In a physical reaction, the appearance of the object is changed, but nothing new is created. An example of a chemical reaction would be lighting paper on…