In order to investigate the effect of cobalt additive on the phosphate coatings, the surface morphology of these coatings was evaluated. Scanning electron microscopy images for the samples containing cobalt additive are shown in Fig. 1. Based on the illustrated pictures (1-a), phosphate coating without additive has more cracks than the other samples. By adding the additive, the amount of crack in the coating’s structure decreased; the lowest amount of cracks was observed for sample containing 3g/lit ion cobalt (Figure 1-d). The structure of phosphate crystals based on the obtained results is mainly in the form of plate and mud. Phosphate coatings containing additive have a more plate texture than phosphate coatings without additives, so that the most plate-shaped structure was observed for sample containing 3g/lit ions of cobalt. Therefore, changing the amount of plate-shaped structure based on surface morphology leads to an increase in the size of phosphate crystals for specimens containing cobalt additive [27]. By adding the cobalt additive, the phosphate crystals formed on the zinc get more uniform and contain less porosity. The densest coating of the phosphate coating samples was obtained with 3g/lit ions of cobalt. However, the excessive addition of additive (4 …show more content…
The size of the phosphate crystals for the phosphate coating consisting of 1 and 3 g/lit Co is 50 and 38 nm, respectively. Thus increasing the amount of additive by increasing the germination points reduces the size of phosphate crystals. However, the addition of 3 g/lit Co to the coating, in comparison with the phosphate coating with 2 and 4 g/lit Co additives, increases the size of the phosphate crystals and the thickness of the coating, and can be effective in improving the corrosion resistance of the
Cadet Eric Wiggins Date: 18 September 2014 Course Name: Chem 100 Instructor: Captain Zuniga Section: M3A Identification of a Copper Mineral Intro Minerals are elements or compounds that are created in the Earth by geological processes. The method of isolating metals in a compound mineral is normally conducted through two processes.
The can be seen when iron is coated in zinc. This process is efficient by comes with the prices of losing the zinc due to the fact that the zinc will oxidizes instead of the iron
In order to do this experiment we had to prepare by buying our supplies, and follow some safety steps. We had to use some safety gloves when handling soda ash because if we ate after handling it we could of gotten very sick. Also any supplies that came in any contact with the soda ash couldn’t be used for food after. Also we had to buy different types of fabric, cut them into 20 by 20 cm squares and label them. We had to buy some dye in order to find out how each fabric reacted to it.
Copper Cycle Lab Report Ameerah Alajmi Abstract: A specific amount of Copper will undergo several chemical reactions and then recovered as a solid copper. A and percent recovery will be calculated and sources of loss or gain will be determined. The percent recovery for this experiment was 20.46%.
The percent recovery of the copper was calculated using the equation, percent recovery = (the mass of the copper recovered after all the chemical reactions/the initial mass of the copper) x 100. The amount of copper that was recovered was 0.32 grams and the initial mass of the copper was 0.46 grams. Using the equation, (0.32 grams/0.46 grams) x 100 equaled 69.56%. The amount of copper recovered was slightly over two-thirds of the initial amount.
Provided by the Sodium Phosphate MSDS sheet, sodium phosphate is easily soluble in water and the color appears to be colorless (Material Safety Data Sheet - ScienceLab.com). In
Abstract – Methyl trans-cinnamate is an ester that contributes to the aroma of strawberry. It can be synthesized by an acid-catalyzed Fischer esterification of a methanol and trans-cinnamic acid under reflux. The solution was extracted to obtain the organic product, and evaporated residual solvent The yield was 68%, but there is some conflicting data regarding the purity. The melting point, IR, GC-MS indicate a highly pure desired product whereas 1H NMR shows there are unreacted reagents still present.
However, Phosphorus is soluble in Phosphorus Disulfide and is not able to rust. Not only do they differ at these properties, but they also have different atomic radii, electronegativity, and electron configuration. On one hand, Titanium’s atomic radius, or the size of its atom is 215 pm. Its electronegativity, or the “... measure of the tendency of an atom to attract a bonding pair of electrons,” (Clark Jim, 2013), is 1.54. Titanium’s electron configuration, or as written in Lenntech.com, is a description of the arrangement of electrons in circles around the core, is [Ar] 3d2 4s2.
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
a single phosphate compound can be used in a pharmaceutical, personal care products, cleaners and technical uses such as a fire extinguisher, it depends on application, a higher application requires more ingredient. Phosphate products an important part of everyday living. The government authorities says that is safe for working with and for use at home. in many bodies of water,
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The principle involved in this test is the precipitation of phosphate which bores a yellow-colored solution and yellow precipitate. In the sample, neither a yellow-colored solution nor a yellow precipitate appeared which indicates the absence of phosphate in the sample. In the test for Purines, or Murexide test, the standard solution used was solid guanine. The reagents used were concentrated HNO3 and 10% KOH.
The motive behind this experiment is considered to be the aspect of determining the interconnectedness or dependency of absorbance and the concentration of cobalt in various solutions for the reason that an approximation regarding the concentration of cobalt nitrate in an unknown solution needs to be discovered. Meanwhile, in this lab the colorimetry is a tool that was used to calculate the unknown concentration of cobalt nitrate in this ambiguous solution sample from a particular sample of soil. Firstly, a beam of light with certain wavelength was passed through 10 diverse cobalt (II) nitrate solutions, that of (0.1M to 0.01M) accompanied by a detector in the machine that calculated the light absorbed by each sample. Moving on, the big picture
Properties of Ionic and Covalent Substances Lab Report Introduction The purpose of this lab was to determine which of the following substances: wax, sugar, and salt, are an ionic compound and which are a covalent compound. In order to accurately digest the experiments results, research of definitions of each relating led to the following information: ionic compounds are positive and negatively charged ions that experience attraction to each other and pull together in a cluster of ionic bonds; they are the strongest compound, are separated in high temperatures, and can be separated by polar water molecules. A covalent compound forms when two or more nonmetal atoms share valence electrons; covalent compounds are also
Effect of saliva contamination is a matter of great controversy. Few studies have reported that the use of dentine bonding agents under fissure sealants has reduced their sensitivity to saliva contamination and provided high bond strengths(85.86). Some have reported that the saliva contamination of dentine had no adverse effect on the bonding efficiency of one-bottle adhesive systems(10). Others have shown that the saliva contamination of the dentine surface produced a significant decrease in the bond strength(87.88)