Objective: The objective of this lab was to calculate the ratio of the copper sulfur compound to conclude whether the compound is made of copper I or II. Procedure: A copper coil was twisted. The mass of the copper coil was found. The copper coil was placed in a crucible. A sulfer powder was added to the crucible to cover the copper coil. The cover was placed on the crucible. The Bunsen burner was lit. The covered crucible was placed on the triangle, on the ring stand, above the flame. The crucible was heated for about 10 minutes or until all the powder is gone. The crucible is allowed to cool. The coil is massed. Theory: Mass of Sulfide = mass of compound - mass of copper coil Emperical ~ mass of copper coil x ___1 mole___ = ___moles Cu Gram molar mass Cu Mass of Sulfide x ___1 mole___ = ___ moles S Gram molar mass S Emperical Ratio: __moles Cu / ___moles S : __ moles S / __moles S % Composition ~ _mass of element_ x 100 mass of compound mass : mass conversion ~ mass of Cu x _1 mole Cu_ x 1 mole compound x gram molar mass of compound = mass gram molar mass Cu gram molar mass S 1 mole of compound of compound Data: ... ... middle of paper ... ... Copper II Sulfide ~ (final mass of compound) _ç3.07g - 2.59gç_ x 100 = 15.6% 3.07g The compound was predicted to be Copper I Sulfide because the error analysis of the final mass was only 1.17% and the error analysis of Copper II Sulfide was 15.6%. Also the empirical ratio is 2:1 which fits Copper I Sulfide (Cu2S), but not Copper II Sulfide which has an empirical ratio of 1:1. The % composition and mass : mass conversion was calculated for both Copper I Sulfide and Copper II Sulfide in order to make sure the results and conclusions were as accurate as possible. There were no problems during lab. The process ran smoothly. To improve this lab, the cover should not be removed from the crucible until the powder has completely disappeared.
The primary goal of this laboratory project was to identify an unknown compound and determine its chemical and physical properties. First the appearance, odor, solubility, and conductivity of the compound were observed and measured so that they could be compared to those of known compounds. Then the cation present in the compound was identified using the flame test. The identity of the anion present in the compound was deduced through a series of chemical tests (Cooper, 2009).
A: The reaction with water and vinegar was the most useful in this experiment. The physical properties were very self explanatory because the texture of the powders was all different expect icing sugar and cornstarch. Also the Ph levels were very similar of six and seven for corn starch and icing sugar respectively. d) Q: How confident do you feel about your identification of the
"A vessel of a very refractory material used for melting and calcining a substance that requires a high degree of heat." "A severe test." "A place or situation in which concentrated forces interact to cause or influence change or development." All of these definitions lead up to one word. Crucible. Author Miller incorporates this word in his play, The Crucible. The aforementioned definitions play a large part in The Crucible's symbolism, characters, and plot.
A Crucible is a container that can withstand great amount of heat, such as one required for refining gold. It can also mean a severe trial. In the play “The Crucible” by Arthur Miller, severe trails occur throughout the play, not just in the courtroom but also in people’s homes and souls. I believe Arthur Miller named his play “The Crucible” because it shows the trials and hardships people face within themselves, the courtroom and Puritan society.
The first definition of the word crucible is a pot made of porcelain that can be heated to high
When Arthur Miller wrote The Crucible he intended to create a symbolic story. An obvious sign of The Crucible having a deeper meaning is that it was written to satirize the Red Scare of the 1950s. In addition the powerful title of The Crucible has several meanings that relate back to the play. The first meaning of the Crucible is “a container for melting or purifying metals,” and the second meaning is “a severe trial or test.” As a third meaning one could also say that the word “crucible” is related to the word “crucifix” and by extension the word “bible” if we extrapolate. Fourthly and lastly the Crucible can also be thought of as a literal kettle. Upon analysis it is striking at how aptly the title fits the story.
In conclusion the Crucible is linked to the play both metaphorically, directly and historically. It is an interesting fact that a crucible is a melting pot especially for metals because the word metals has a homophone, mettle which means natural ardour, spirit, strength or courage. These are some of the qualities John Proctor displays towards the end of the book as his mettle is tested and purified. The title is relevant to most of the themes and issues that the play explores. The title is very effective due the fact it is provocative and encourages one to reflect on the play, its meaning and also its contemporary truth.
A crucible, as defined by Oxford Dictionary, is “a ceramic or metal container in which metals or other substances may be melted or subjected to very high temperatures.” Miller experienced the pressures of the United States government and felt the need to speak up about the issue of McCarthyism in the country, which was the reckless blaming and imposition of Communism onto politicians during the period of time after World War II without proof or evidence. The Crucible, written as a response to McCarthyism, uses the Salem Witch Trials to show that the irrational accusations that the American people were making about Communists are a direct reflection of the events in Salem in the late 17th century and will lead to chaos and recklessness. Just
On the periodic table its atomic number 29 and its symbol is represented by symbol (initials) Cu. Copper is used as building material. Copper, “is also the oldest metal known to man and was first discovered and used about 10,000 years ago” (CDA). In today’s world with a growing economy one may realize that electricity is being used continuously. Therefore, high amounts of copper is used especially in the electricity industry for wires and at construction sites. Many Americans wear jewelry such as rings, watches, bracelets and necklaces that is made of copper. The unique thing about copper is it’s resistant to corrosion due to moisture and one does not have to worry about the metal changing colors. On the other hand everything that looks good is not always good. Although copper seems harmless copper can be detrimental to one’s health. Copper can enter the body through the skin or by simply drinking the water that contain it, “Long-term exposure to copper can cause irritation of the nose, mouth and eyes and it causes headaches, stomachaches, dizziness, vomiting and diarrhea. Intentionally high uptakes of copper may cause liver and kidney damage and even death” (BV). Individuals that work in coal mines or in plants were copper is being processed are at a higher risk of being
The Gravimetric Stoichiometry lab was a two-week lab in which we tested one of the fundamental laws of chemistry: the Law of Conservation of Mass. The law states that in chemical reactions, when you start with a set amount of reactant, the product should theoretically have the same mass. This can be hard sometimes because in certain reactions, gases are released and it’s hard to measure the mass of a gas. Some common gases released in chemical reactions include hydrogen, carbon dioxide, oxygen and water vapor. One of the best methods for determining mass in chemistry is gravimetric analysis (Lab Handout).
2 FeS2 ----> 2 FeS + S2 (Bretscher, 2009). Sulfur is a “matrix constituent” in the black powder. This means that it allows the powder to be a hotter and more stable burning powder which is imp...
The usual and most widely used definition for crucible, according to the New Oxford Dictionary of English, is: “a pot or vessel made of a substance, such as porcelain, that will withstand extreme heat for the use of melting various materials.” This definition is easily connected to the play. First off, witches supposedly use cauldrons to brew their magic potions, and a synonym for cauldron is crucible. Not only do witches use cauldrons, but the word crucible also could have some meaning as a metaphor. The actions in Salem were like that in a brewing cauldron, there were many heated arguments, and people were being ‘stirred’ and ‘mixed’ around like a vile potion.
Arthur Miller’s The Crucible is an intricate piece of literature. He assembled this literary labyrinth using precision. One example of his twisted methods is his use of the word, “crucible”, in his text. What does the word, “crucible”, mean? This word has five definitions, and Arthur Miller has managed to bring all five of them into play in The Crucible. One definition of the word, “crucible”, is “The light placed in front of The Crucifix”. This definition, unlike the others, is used in a largely abstract way in the text. The, “light”, in The Crucible is a symbol of shining a light on, or drawing attention to, certain issues.
The result for density of all mixtures with difference proportions of pure copper slag and spent copper slag shown in Table VIII and Table IX respectively. The density of cement-sand brick slightly increased as spent copper slag content was increased. The density of cement-sand brick was increased by almost 13.4% for mixture of replacement 60%PCS as fine aggregates, due to the fact that pure copper slag has higher specific gravity compared to the river sand.
To investigate the temperature change in a displacement reaction between Copper Sulphate Solution and Zinc Powder