The purpose of this experiment was to identify the two components of an unknown mixture through diverse experimental techniques such as recrystallization, extraction, melting point, and acid-base reactions. From this, the group to which these two compounds belong to had to be determined. These groups are: Carboxylic Acids, phenols, and neutrals. By determining the melting points of the two unknown compounds, these values were compared to the values of melting points in the chart and the proper compound was selected. For the case of this experiment, the unknown mixture contained, 4-methylbenzoic acid.
Physical properties which include physiological and environmental signals such as temperature, humidity, and amount of sunlight. The interaction parameter associated with both the computing and
A mixture of elements is what is known as compounds. Chemical reactions occur when particles react with each other and atoms in molecules get rearranged. Reactions happen either rapidly or slowly. The speed of a reaction is known as the rate of the reaction. This speed of chemical reaction depends on many factors such as temperature, particle size of reactants, and the intensity of reactants.
Throughout the experiment, copper was altered a total of 5 times, but after the final chemical reaction, solid, elemental copper returned. Each time the solution changed color, a precipitate formed, or when gas appeared, indicated that a chemical reaction was occurring. For the first reaction, copper was added to nitric acid, forming the aqueous copper (II) nitrate (where the copper went), along with liquid water, and
In the book The Martian, Mark Watney survives on Mars due to the chemistry concept involving physical, chemical and nuclear changes, examples include him burning rocket fuel to make water and maximizing the use of his oxygenator and water reclaimer. Despite there being some other concepts that aided Mark in his survival, the way he understood physical, chemical and nuclear changes greatly increased his chances of living. To break it down, a physical change is any change in matter that involves a substance going from one state to another. A chemical change is when the substance is changed from its initial make up. Then, a nuclear change is when the nuclei can break apart to from a different element all together.
As soon as the wire was submerged into the solution, the aluminum atoms and the copper (II) ions underwent a reduction-oxidation (redox) reaction, meaning aluminum was oxidized and donated its electrons to the copper ions, which were reduced. As a result, solid copper began to form on the surface of the aluminum wire, giving the wire a brown-orange color that resembled rust. The wire had to be regularly shaken in order to remove the solid copper particles and thereby expose more of the aluminum wire to react with the surrounding solution. As the reaction progressed, the liquid copper chloride solution slowly began to lose its color and turn clear. This was a chemical reaction, as seen by the bubbles formed with the wire was added, meaning gas was released when aluminum was oxidized and copper was reduced, but it also gave rise to physical changes, such as the change in color of the solution from blue-green to rusty orange to clear.
Introduction: The purpose of this experiment is to demonstrate the different types of chemical reactions, those including Copper. There are different types of chemical reactions. A double displacement reaction is a chemical process involving the exchange of bonds between two reacting chemical species. A a decomposition reaction is the separation of a chemical compound into elements or simpler compounds and the single-displacement reaction is a type of
Physical chemistry- the branch of chemistry concerned with the application of the techniques and theories of physics to the study of chemical systems. Thermochemistry- the branch of chemistry concerned with the quantities of heat evolved or absorbed during chemical reactions. Biochemistry- the branch of science concerned with the chemical and physicochemical processes that occur within
Properties of Substances Express Lab 1)The purpose of this lab was to compare the physical properties of different types of solids and how the properties of solids are determined by their intermolecular forces and their intramolecular bonds. Then we were to classify each type of solid as either ionic, metallic, non-polar molecular, polar molecular, or network. Paraffin wax classified as a non-polar molecular, Silicon dioxide was classifies as a network, Sodium chloride was classified as ionic, Sucrose was classified as polar molecular and Tin was classified as metallic. (2)The intermolecular forces that are present in Paraffin wax are dispersion forces, because it is non-polar and carries a negative charge. Followed by Sucrose that has
Physicalism says all objects in nature satisfy conditions for being physical but there is a divide among philosophers on the conditions themselves. There are questions raised as to what exactly are the conditions for something to be physical. Physicalists say that if something is not visibly physical at the first glance it supervenes on something that is physical. The use of ‘physical’ in physicalism is different from it’s use in general sense. Any property which is a metaphysical or logical combination of the general physical properties is a physical property.
These particles would change into other elements. A new phenomenon was discovered-radioactivity. To understand how atoms change, we have to look at the structure of an atom; namely, the nucleus of the atom. The atomic nucleus cannot be seen by the naked eye. It is
Physical beauty is one which defines a person’s features, figure, or complexion. Also, inner beauty which can be one’s personality traits, habits, as well as sense of humor. Physical beauty is based mainly on one’s outermost appearance. Such as, the eyes, hair, or physique. On the other hand
They include: elements are fundamental building materials of matter and can be understood in terms of arrangements of atoms and they retain their identity in reactions; properties of materials can be explained by the structure of atoms and molecules; changes in matter involve the rearrangement of atoms and/or electrons; rates are determined by details of molecular collisions; thermodynamics describes the roles of energy and explain the direction of changes in matter; and equilibrium is sensitive to initial conditions and external perturbations. These goals are the 6 big ideas set forth by College Board for the AP Chemistry exam. The students need to be proficient in these 6 big ideas by the AP exam on May 7. The instructional goals for this unit cover several of the learning objectives for the first big idea (elements are fundamental building materials of matter and can be understood in terms of arrangements of atoms and they retain their identity in reactions) by students learning the electron arrangements of atoms, how those are interpreted on a PES graph and how those affect the periodic trends.
Eat, a verb that means to put food into your mouth and chew or swallow. It’s not that easy, there is a whole process in order to get food, whether cooked or not it still has a certain procedure. When we eat, it’s when the body and mind to act as one, emitting emotions that go through a whirlwind and pure satisfaction or distaste could be felt. “We are what we eat”, we are that apple we had for breakfast or that tasty chocolate crepe for dessert. According to Plato, “the soul both pre-existed and survived the body, going through a continual process of reincarnation of transmigration” (Philosophy Online)
Physical geography and Human geography We have two types of geography. Physical geography and human geography. Physical geography is about Earth’s land areas, bodies of water, plant life, and other physical features.
