Development Of A Reaction Matrix Essay

1242 words - 5 pages

Development of a Reaction Matrix: What Are the Identities of the Unknown Chemicals?
Introduction
In chemistry it is often necessary to identify unknown substances. There are many procedures and pieces of equipment that can help a chemist to identify unknown substances, such as mass spectrometry or gas chromatography. While some of these methods and equipment are very complex and others are simpler, a common feature of each of these approaches is the comparison of properties of known substances with those of the unknown substances. Chemists can observe and compare physical properties of known and unknown substances, such as boiling point or density; likewise, it is possible to compare chemical properties such as how an unknown substance reacts with a known substance. One problem with testing and comparing physical properties of a substance involves solutions. It is possible that two different solutions will have the same density or even the same boiling point; in such a case those properties would not be helpful for differentiating between the two substances. In this situation, it may be more helpful to use observations of chemical reactions involving the unknown substance to determine what is in the solution.
An aqueous solution is created when a substance, the solute, is dissolved into water, the solvent. When different aqueous solutions are mixed together, it is possible that the substances dissolved into the water will undergo a chemical reaction, which may produce a precipitate. A precipitate is an insoluble ionic compound. Adding a few drops of an unknown solution to a powder may also cause a reaction, which might result in the formation of a gas. Other observable outcomes of a chemical reaction might be a change in color or a change in temperature. Since the chemical properties of a given substance are consistent when chemicals react with each other, the resulting products are also consistent and predictable; therefore, combining solutions together can be used as a way to identify them. This systematic process can be used to develop a table of reactions and their results, or a reaction matrix. If you know how specific known chemicals react with each other, it is possible to identify unknown chemicals by comparison.
Pre-Lab
1) What are the 4 observable signs of a chemical reaction?
2) Why is it not possible to see some of the chemicals dissolved in water when they are visible as solids? (for example salt is visible as a white solid but invisible when added to water)
3) If a solid forms as a result of mixing two solutions, what does it tell you about the attraction of the chemicals that formed the solid to each other compared to their attraction with water?(what were they more attracted to?)
4) Name the following and determine if they are solids or soluble.
a. Na2SO4 b. . SbCl3 c. HgO d. Fe2S3 e. Pb(NO3)2 f. Al2S3 g. PbI4
Your Task
You will be given seven labeled bottles to test and record data in order to generate a react...

RELATED

to what extent was romanticism a reaction to the enlightenment - University of Brighton - essay

1912 words - 8 pages zelal aktas 1/25/18 CTWT ESSAY 2 To what extent was Romanticism a reaction to Enlightenment values? Although it appears Romanticism is a complete contrast to the Enlightenment values that comes before it, such as the importance of objective thought, the necessity to think with reason and logic and more. However, upon further study of the literature and ideas that Romanticism portrays, I would argue that it is more of a development of the

Investigating a factor that affects the volume of H2 at the cathode in an electrolysis reaction

630 words - 3 pages IntroductionAn electrolysis cell uses an external source of voltage to bring about a non-spontaneous redox reaction. In an electrolytic cell electricity is passed through an electrolyte and electrical energy is converted into chemical energy. Electrolysis enables neutral elements to be released from ionic compounds by discharging the ions through oxidation and reduction reactions. The power source pushes electrons towards the negative electrode

Western Reaction to the Berlin Wall - University of Texas HIS 350L - Essay

1255 words - 6 pages Ben de Alvarez Dr. Brown Research on the Global Cold War 18 September 2017 Western Reaction to the Berlin Wall Perhaps the most critical moment of the Cold War, the Berlin Wall crisis of 1961 presented a precarious quandary for John F. Kennedy and his administration. Since the division of Germany post World War II, thousands of East Germans fled the Soviet controlled German Democratic Republic to seek economic opportunity in West Germany. Berlin

goverment policies and development, NDP AND Sustainable development - university of johneesburg - essay

3381 words - 14 pages the goals of sustainable development in order the human development goals can be achieved without undermining the ability of natural systems to supply the ecosystem services and natural resources upon which the country rely on (Alfred 2010:20) In this case this essay will start by defining the key concepts which will be used throughout the whole essay, namely, sustainable development, policy, strategy, government programmes and government to

A Delve into the Man Behind Cognitive Development - A Biography of the Great Jean Piaget - Houston Community College - Dual Credit Psychology - Essay

1251 words - 6 pages Running head: A DELVE INTO THE MAN BEHIND COGNITIVE DEVELOPMENT 1 A Delve into the Man Behind Cognitive Development A Biography of the Great Jean Piaget Abel Bunn Cirillo — D.C. PSYC-2301 April 26th, 2019 A DELVE INTO THE MAN BEHIND COGNITIVE DEVELOPMENT 2 Abstract This paper biographies Jean Piaget, a Swiss psychologist who was renowned for his immense alms to the field of psychology, especially when concerning his emphasis on the adequate

Income as Measurement of Development - SOAS, Masters - essay

2947 words - 12 pages development by traditional economists. However, this essay will attempt to disprove that proposition. Income per capita is too narrow of a determinant and at best, a single factor that contributes to human welfare and development. This essay will explore alternative measures such as the Capability Approach, Human Development Index and the Social Development Index, which regardless of their own limitations, offer a more holistic view of human

Life Span of Human Growth & Development - PYS 280 - Essay

1584 words - 7 pages . In regard to that, their potential development and improvement is viewed as multi-directional, multi-contextual, multi-cultural, and plastic. Each term of the life expectancy point of view carries diverse importance to the assessment of a person's life. The principal term, multi-directional, is an assessment of a person's headway, stagnation, and decay for a mind-blowing duration time. Their life could be direct with a few progressions tailing

Heart of Darkness and Kurtz's development - English IV - Essay

1257 words - 6 pages 1 Godoy Coni Godoy Dr.Williams English IV 14 December 2017 Heart of Darkness Midterm In Joseph Conrad’s Heart of Darkness, we see that Kurtz has gone through a drastic development throughout the course of the short story. Kurtz enters Africa wanting to help westernize the culture but ends up coming out of it just as savage as the natives inhabiting it. His insanity can be recorded as three main stages in his development. The first stage analyzes

Development of the Periodic Table - Valley View Secondary School - Essay

429 words - 2 pages Adriane Quigao Development of the Periodic table The periodic table is a table of arrangement of chemical elements in order of atomic number. The table is organised in rows, so that elements with the similar atomic structure and similar chemical properties, appear in vertical columns. Antoine Lavoisier was the first to write an extensive list of elements containing 33 elements and distinguished between metals and non-metals. He was scientist who

major contributors to the development of modern astronomy - excelsior - essay

1242 words - 5 pages accepted until more than 100 years after his death. Four other major contributors to the development of modern astronomy were Tycho Brahe, Johannes Kepler, Galileo Galilei, and Isaac Newton. Tycho Brahe was a Danish explorer who was able to pinpoint the location of Mars without a telescope . In fact, the telescope was invented twenty years after Brahe’s discovery (USA.gov Staff, “1500s”). German scientist, Johannes Kepler, discovered three major

Physical Development in Middle Adulthood - University of Phoenix - Essay

1065 words - 5 pages University of Phoenix Physical Development in Middle Adulthood Learning Team D BSHS/325 5/24/2015 We as growing humans have a very interesting life span. We go from infancy, childhood, adolescence, young adulthood, middle adulthood, and late adulthood. With each span of development in our lives also comes with challenges. While they may seem like simple challenges looking back on them or even from a perspective of a textbook, they all have an

Infancy Development, A Timeline of What's to Come - Georgian Court, PS221 - Research Paper

2270 words - 10 pages 2 Physical, Cognitive, Social, and Emotional Development in Infancy. Krista L. Bilowus Georgian Court University I was able to sit down and interview a mother with her 8 month old son. The mother is 2 years of age, a stay at home mom, and is part of the middle class. The father works full time to support the family, and the home life is a very stable environment. She has 1 other son who is 3 years of age, but for the sake of this interview I am

Does abuse at a young age affect the development of children? - AP Seminar - Research

2213 words - 9 pages darelys m [COMPANY NAME] [Company address] DOES WITNESSING AND EXPERIENCING ABUSE AFFECT A CHILD’S DEVELOPMENT, OR THEIR PRONENESS TO BECOMING ABUSERS? Word Count: 2049 The Childhood Domestic Violence Association, a leading nonprofit organization dedicated to helping victims of childhood domestic abuse, stated, “5 million children witness domestic violence each year in the US.” Such high numbers of witnesses to these heinous and wicked acts

A detailed analysis of the 1st scene in The Matrix - "Neo Wakes up"

381 words - 2 pages Free Neo's world, at first impression, seems dark, scruffy and somewhat depressing. This is partly conveyed by the dim lighting and the digenic sound of Neo's walkman, which also adds authenticity. A close up on Neo's face establishes him as the main subject and a panning shot reveals part of his environment. A long high angle shot of Neo sitting at his computer establishes the size and cluttered state of his living space. The set is made to look

A child study demonstrating personal, social and emotional development - Portobello 2nd year - Essay

4374 words - 18 pages Introduction I am going to compose a report demonstrating high quality out of home provision. The report will be based upon research and theory and will look into the impacts that practise and provision have on a child’s development and well-being. I will evaluate the role of the practitioner and how it effects children’s learning experiences. The historical and current social policies that relate to the well-being, care and education of