Chemistry Essay

All standardizations are performed in triplicate. Weigh out .1000-.1200 gram KIO3. Add 70-80 mL of deionized water. Swirl and dissolve. Add 3 mL of 6M HCl. Swirl and mix. Quickly titrated the brow-red solution with 0.1M Na2S2O3 until it is light yellow. Then add 3.5 mL of starch indicator. Titrate again until the dark color first disappears.

Directions: Read/ Study all the lesson information in the 5.03 lesson then click the activity tab to perform two virtual labs. (There are recorded Teaching Videos for lesson 5.03. To view them click the “Help Sign” on the announcement page. Next scroll down to Lesson 5.03 stuff and you should see 5 part video links that will cover the lesson content.)

B. Claim: As we go from methanol  ethanol  1-propanol  1-butanol the dispersion forces increase.

This is a simple equation that doesn’t properly prove the reaction. It is very complex and starts with this:

Purpose: The purpose of this experiment is to observe a variety of chemical reactions and to identify patterns in the conversion of reactants into products.

Sulfur makes up 3% of Earth’s mass, which could create two more moons. Sulfur can bond with almost every element. It has an expansive history dating to the Bible. Although, this element has a terrible odor, it is needed and known in the human diet as methionine.

The following months a winter, cold and gloomy, surrounded the house. My grandmother came to stay with us since my father had fallen into depression and needed help taking care of my sister and I. When my grandmother went grocery shopping my sister would struggle with homework without my grandmother’s help. One day when my grandmother left to go grocery shopping my sister approached me, which was unusual of her since its very rare for her to come to me. Her dark brown hair and big eyes reminded me of my self when I was younger. “I’m hungry” she complained, a question she’s never asked me. My father sleeping and my grandmother away, I was the only one left to take care of her and that terrified me. I had never cared for or known how to care for someone else. All I knew was how to evaluate whether or not someone was caring for another correctly.

The chemical element Lithium (Li) has an atomic number 3and is the first member of the Alkali metal family. This element is also the least dense of all the metals – about half of the density of water. Lithium is a very soft silvery metal that has a melting point of 180.54˚c and a boiling point of 1,335˚c. This is an active element but nit as active as the other Alkali metals. This element reacts slowly on a water having a room temperature and rapidly at high temperatures. Also, lithium reacts with most acids that gives off hydrogen gas but does not react with oxygen. Under conditions, lithium is combined with sulfur, hydrogen, nitrogen and halogens. There are two naturally occurring isotopes;

Changes in matter occur every day. There are two types of ways matter can be altered; physically and chemically. Physical changes do not change the composition of the matter while chemical changes occur when one or more substances turn into a completely new substance.

In assessing the effect of temperature on the viscosities of water, corn syrup, and acetone, the temperature of the water bath was varied from test to test. At each temperature, with the exception of water at 25.3℃, three trials were run in which the time that it took for the material to travel between the marked lines on the viscometers was recorded. By having multiple data points for each test, a greater level of certainty could be obtained when the time came to analyze the data. For the experimentation of the three liquids, the same set of water baths was used, and the sample materials in the viscometers were not altered or substituted between any of the tests. Additionally, for all of the liquids, the materials were given approximately fifteen minutes after being moved to a new water bath to adjust to the temperature before starting any tests. The information that was recorded for each test included the time that it took for the liquid to travel between the lines on the viscometer, the water bath temperature, and the viscometer constant, k, of the viscometer being used. In addition, in order to convert the experimentally determined kinematic viscosities into dynamic viscosities, data for the mass occupying a pycnometer was gathered for each

Chemistry is necessary for the area of cooking it is helpful to prevent explosions from happening when baking as a result of chemical reactions occurring. Teaching the subject of history to students is necessary in order for the citizens of our country not repeat the same mistakes. Government is important to teach students the rights they have as a citizen of the United States to help them enjoy their freedom. I believe that Students should be taught the laws that might have an effect on their lives as they are in school to prevent them from ending up on the other side of the law without their knowledge of doing so.

Our entire universe is made up of matter which is constantly changing forms and evolving into other forms of energy. Chemistry is defined as the study or science of this ever changing matter. Or chemistry is essentially the study of materials and the development of new materials for the betterment of humanity. We use chemistry from the beginning of the day till its end, the toothpaste we use to brush our teeth is made of abrasives, fluoride, and detergents. It is a very simple fact that chemistry plays an important role in every person’s daily activities from the moment we’re born. The role of chemistry usually begins first thing each morning. Most people wake up to an alarm or radio. These common household items contain batteries, which

I am submitting a formal request to have general chemistry 1 autumn semester of 2013, as well as Precalculus spring semester of 2014, removed. In autumn of 2013, I moved back home to Lima, Ohio to take care of my father. I decided that by moving back home with my dad, I would be able to provide for him financially and mentally. Also, I assumed with this new responsibility, stress would be involved, so my plan of action was to take a few classes to continue my education. In Autumn 2013 I enrolled in Latin American History to 1825 and Chemistry 1220. I didn’t fully encompass the responsibilities of taking care of my very ill father and shortly, I became overwhelmed with school. It was one thing after another with my dad not only assisting him to his doctor appointments but cleaning, cooking, working, and the endless nights staying up at the hospital. I didn’t feel defeated just quite yet though; I remained determined to do well in my courses. When things seemed like they were heading in the right direction, somehow things would turn for the worse with my dad. I specifically remember one night trying to work on chemistry and I heard my dad faintly call my name so I head to go see what he wants. To my horror I see my dad on the floor of the bathroom unconscious, the toilet seat was broken with blood and urine everywhere. I was utterly horrified, I called 911 and before they got there I frantically tried to clean him up and carry a 210-pound man down the stairs of a two story

Organic and chemical are both antagonistic words, and both are rivals to say in the horticulture and agriculture industries, as one of the words invokes a sense of greenery and meadows while the other hinders to synthetic mixtures and various concoctions in a sterilized environment. What organic fertilizers means is that they are minimally processed, in which the nutrients are sourced in their natural form. Most of these sources are made from plant waste, animal wastes, and powdered materials such as glacial rock dust and bone meal. On the other hand, chemical fertilizers are refined nutrients from extracts that are mixed with chemical dressings to create a specific ratio. Chemical fertilizers are made from petroleum products, certain rocks, and also from organic sources.

Chemistry has been around for a very long time. Chemistry is the branch of physical science that studies composition, properties, energy, and behavior of matter. It is said that chemistry has been around since prehistoric times. This was in the form of everyday objects like pottery, cosmetics and perfumes, and extracting metals from ores. Chemistry is based on the discovery and study of elements. Some elements were known to ancient man, but most were discovered by chemists and alchemists. Some say that chemistry started in the early Stone Age when man made fire. Chemistry is the study of chemical composition and properties of matter and the reactions of that matter. The study of any living thing involves chemistry.