Purpose: To recognize the evidence of a chemical change and to prove the law of conservation of mass by observing a series of chemical reactions involving copper. A specific quantity of copper will be transformed through a series of chemical reactions to form new substances and then recovered as solid copper. A percent yield will be calculated to determine the amount of copper recovered from the chemical reactions.
Then the mass of the copper metal and the percentage of Cu were obtained and compared throughout different groups and a mean and standard deviation was calculated for the
As for the rock portion of the experiment, the students concluded that the mass percent of copper was 3.1%. This mass percent of Cu2+ is above the accepted value of 1.0 percent copper, which is the economically viable percent for mining copper ore. From this value of 1% copper in copper ore manufacturers can extract 9.99% pure copper (Copper Mining and Processing: What is Copper?, n.d.). These results show that the provided sample of copper ore would be worth mining, since it contains a higher percent of cu2+ than is needed to mine for copper. Overall, the experiment was accurate in determining the mass percent of cu2+ in the rock sample.
The substance or substances can convert into different substance or substances as a result of a chemical reaction. Some common indicators of a chemical reaction we discussed in class are, color change, forming of new substances, and energy being released, A physical change is when the original substance is still the same substance after the change. However, the physical form of the substance can be changed. For example, paper can be ripped into small pieces, the paper is still the same material but the form of it is different. An example from one of the reactions is when baking soda and acetic acid were mixed.
For the unknown phase two project, I was assigned unknown number one. After many tests, I came to the conclusion that my unknown was Acinetobacter baumannii. It had cultural characteristics of yellow or clear colony pigmentation, smooth and translucent surface, circular form, smooth margin, and flat elevation. The unknown’s broth properties included a ring, turbidity, and sediment.
The same metal was placed in vertical columns in an effort to organize the metals. Groups moved to each solution labeled and covered the metal in the respective solution. Observations to how each metal reacted to a solution were then recorded. Each metal was covered in five different solution compounds. Unless the metal and the solution compound contained the same element, such as iron and iron (III) chloride.
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
Question Will the percentage of acid in a fruit affect how much power, or elecrical current it can produce? Hypothesis I believe acidity will affect a fruits production of an electrical current. The more acidic the fruit, the more electricity it will produce.
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
Lab Report Experiment 6 Rates of Chemical Reactions By Nikhola Mirashirova Lab Partner: Dina Abetova Section 3, Saturday October 31, 2015 Introduction Rate reaction is the measure of the change in concentration of the reactants or the change in concentration of the products per unit time.1,2 Rate law for this experiment: Rate = k(I-)m(BrO3-)n(H+)p There are several factors which affect the rate of reaction: catalyst, reactant concentration, and temperature.1,2 A catalyst is a substance that changes, increases or decreases, the rate of a chemical reaction but is not being used up during the reaction.3 It provides an alternative way, so that the rate of reaction changes.4 Catalyst, which is used in this experiment, is (NH4)2MoO (0.5 M).
Applesauce lab report Sarah Azmal, Tillman Mcfadden Problem: A Connecticut company is in the business of making and selling apple juice therefore they need us to see which enzymes is the better choice for them, which enzymes produces more apple juice and the cost effectiveness. Hypothesis: If the enzyme, Pectinase, is added to applesauce, then more juice will be extracted than if Cellulase were added because Pectin holds the cell wall together and if it is separated apart from each other, then more juice would be able to flow out.
The objectives of this experiment were to use knowledge of chemical formulas and chemical nomenclature to experimentally determine the empirical formula of copper chloride. Common laboratory techniques were used to conduct a reaction between copper chloride and solid aluminum in order to get rid of the water of hydration. The amount of water of hydration in the sample of copper chloride hydrate was calculated by measuring the mass before and after heating the sample. Afterwards, an oxidation-reduction reaction was conducted, resulting in elemental copper.
In this experiment, the behaviour of water during boiling process is observed. When water is heated to boiling temperature at constant volume, different regimes are observed until it reaches to saturation pressure. If the pressure is above 1.013 bar, the water is supersaturated. The pressure at which boiling occurs is known as saturation pressure.
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
Nofal et al synthesized a series of 1-(1H-benzimidazol-2-yl)-3-(substituted)-2-propen-1-one (Scheme 6). Claisen-Schmidt condensation of 2-acetylbenzimidazole and 2-acetyl-1-methylbenzimidazole led to the formation of 1-(1H-benzo[d]imidazol-2-yl)-4-(3,4,5-trimethoxyphenyl)but-2-en-1-one which on condensation with hydroxylamine hydrochloride in 5% ethanolic sodium hydroxide yielded 2-(4,5-dihydro-5-(3,4,5- trimethoxyphenyl)isoxazol-3-yl)-1H-benzo[d]imidazole. Some of the selected synthesized compounds were evaluated for their anticancer potential in the two cell lines, HEPG2 (human liver carcinoma cell line) and PC12 (pheochromocytoma of the rat adrenal medulla). Acetaminophen, a known hepatotoxin used as positive control, was tested at concentrations
M icrobiology laboratory is a branch of medical laboratory. Interested in studying infectious diseases, which is the microorganisms [1]. There are four type of microorganisms that causes infectious disease are bacteria, parasites, fungi and viruses. The microbiology laboratory is study the microorganism that cannot be seen by the eyes [2]. The microbiology laboratory is take a sample from patient to know what type of bacteria or another microorganism a causing the disease, and what the best treatment for it.