Lab Report Chemistry Lab
HOW TO WRITE PRECAUTIONS CORRECTLY Precautions should be in reported speech. To write precaution use words such as; I used………………… I ensured …………. I avoided …………. Avoid the use of command language such as; You have to……….. You must …………. You should ……… Note: During an alternative to practical, when asked to state the precautions you would have taken to ensure accurate results if you were to perform the experiment in the laboratory. In this case use words such as; I would avoid……………. I would ensure…………… I would use………………... EXERCISE A student of Dawakin Tofa Science Collage Ali, was performing simple pendulum experiment in physics laboratory, he recorded time, t for 20 oscillations. He repeated the experiment one more time and letter obtained the mean value of t and found his period, T as 0.30sec. While performing his experiment, …show more content…
Use each of the figure to find the main scale, vernier scale and the readings on the instrument. The teacher will show you how to use the instrument (vernier caliper) to measure the internal and external diameter of a tube, the depth and the thickness of a body. You will also be shown how to handle the instrument properly in order to obtain an accurate result. EXPERIMENT M3 THE MICROMETER SCREW GUAGE This instrument is used to measure the diameter of a thin piece of wire. It measures more accurately than a vernier caliper. It consists of a main scale graduated in millimeter and a circular vernier scale that has 50 divisions on it. One division on the vernier scale is equivalent to 0.01mm or (0.001cm) on the main scale. M3 (I) Draw a neat well labeled diagram of a micrometer screw gauge. Complete the following for the comparison of meter rule, vernier caliper and micrometer screw
Nt1310 Unit 8 Lab Report
788 Words | 4 PagesThe design relied on two Schmitt triggers to generate the two different tones while using the transistors to act as a switch. This causes it to trigger continuously between two unstable states, allowing automatic switching between two frequencies producing two different tones. The RC values between the two Schmitt triggers will differ. Capacitors charge and discharge faster when it’s resistance is smaller.
Chemical Reaction Lab
1332 Words | 6 PagesTyler White CHEM151LL 32658 04/01/2018 Different Types Chemical Reaction Types and Equations Purpose: The purpose of this lab experiment is to examine different types of chemical reactions such as Decomposition reaction, Synthesis reactions, Combustion reactions, and different Chemical equations. The experiments were conducted online using Late Nite Labs. Materials: Because the experiments were conducted online there wasn’t any physical use of materials, only digital ones, for these labs to be performed. Only the registration for the website was needed to perform these online labs, as well as a desktop computer.
Sodium Chloride Lab
896 Words | 4 PagesThe purpose of this report is determine if sodium chloride is a viable option as a deicer on winter roads. To determine this, one must compare a multitude of factors. In this lab, the freezing point depression of water, enthalpy of dissolution, cost, and environmental impact will be discussed. A large factor in how effective a substance is as a deicer is it’s ability to decrease the freezing point of water. If the freezing point of water can be lowered, the outside temperature must be much colder to reach this new freezing point, resulting in less ice on the roads.
Unit 3 Biology Lab 3
677 Words | 3 PagesFOV Dia.(mm) FOV Area (mm^2) 10 10 10 100 2mm 4mm^2 20 20 10 200 1mm 1mm^2 40 40 10 400 .5 mm
Quantitative Spectroscope And Visible Light Lab Report
807 Words | 4 PagesThe thickness is more when the slit is wider, and less when the slit is narrower. H. Write up to five sentences describing how a spectroscope works. Make certain to mention things like the light inlet slit, diffraction grating, light, spectrum, etc. Visible light enter into the spectroscope through a slit which focuses the light.
Tn 4351 Unit 5 Lab Report
506 Words | 3 PagesTn 4351 was originally isolated from bacteroides fragilis [30] . The transposon was successfully introduced into Cytophaga succinicans, Flavobacterium meningosepticum, Flexibacter canadiansis, Flexibacter strain SFI and Sporocytophaga myxococcoides by conjugation [25]. Tn 4351carries two antibiotic resistance gene. One of the codes for resistance to erythromycin and clindamycin which is expressed in bactroides but not in E.Coli. The other gene codes for resistance in tetracycline and is expressed in aerobically grpwn E. coli, but not in anaerobically grpwn E. coli or in bacteroides.
Paper Chromatography Lab Report
767 Words | 4 PagesLeah Romero 10/30/2017 Conclusion Lab 3 Chem 102L In lab 3, fundamentals of chromatography, the purpose was to examine how components of mixtures can be separated by taking advantage of different in physical properties. A huge process in this lab was paper chromatography, which was used to isolate food dyes that are found in different drink mixes. The different chromatograms of FD&C dyes were compared to identify which dyes are present in each of the mixes.
Lab Report Spectrophotometry Lab
851 Words | 4 PagesJaspreet Singh Professor Paratore Biology 1 November 1, 2014 Spectrophotometry Identifying Solutes and Determining Their Concentration Statement of the Exercise or of the Problem The purpose of the lab experiment was to attain the following objectives: • Learning to Operate the Spectrophotometer • Construct absorption spectra for cobalt chloride and chlorophyll. Hypothesis If greater and higher concentrations of cobalt chloride are added to each solution then greater amounts of light would be absorbed by each solution. Thus a liner relationship will result in which the absorbance of a substance would be proportional to its concentration, which will be depicted, in a linear graph.
Gas Chromatography Lab Report
1545 Words | 7 PagesINTRODUCTION A gas chromatograph (GC) can be utilized to analyze the contents of a sample quantitatively or in certain circumstances also qualitatively. In the case of preparative chromatography, a pure compound can be extracted from a mixture. The principle of gas chromatography can be explained as following: A micro syringe is used to inject a known volume of vaporous or liquid analyte into the head or entrance of a column whereby a stream of an inert gas acts a carrier (mobile phase). The column acts as a separator of individual or chemically similar components.
Properties Of Substances Lab Report
1038 Words | 5 PagesProperties 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
Essay On Significant Figures
712 Words | 3 PagesMeasurements, Calculations, and Significant Figures Measurements, calculations, and significant figures are vital mathematical terms used to understand the basic concepts of physics. Knowing how to properly make measurements and apply the necessary calculations to obtain accurate answers will surely prove beneficial in physics, but having that knowledge will also help you throughout your entire life. Therefore, it is important to understand the processes and numbers involved when using measurements, calculations, and significant figures. Measurements are used to identify the specific characteristics of an object, such as length, size, and amount. One must use the proper measuring device, depending on the conditions of the experiment and
Ionic And Covalent Compounds Lab Report
902 Words | 4 PagesProperties 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
Muffin Paper Cup Experiment Essay
938 Words | 4 PagesRecord the readings for the time taken, for the particular height (the paper cup was dropped from). Repeat this process (using the same equipment), by varying the height of paper cup from the ground (with a specific difference in height, in each experiment). The independent variable, which is the height the empty muffin paper cup is dropped from, will start at 1 metre and the increase in height will be 0.5 m in each experiment. The use of the clamp stand is effective in this experiment because it will always control or keep constant, the height in which the paper cup is dropped from, unlike somebody dropping the paper cup using his/her hands.
Ionic Compounds Lab Report
878 Words | 4 PagesProperties 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, definitions of each relating factor were researched, leading 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 is formed when two or more nonmetal atoms share valence electrons; covalent compounds are also categorized into two sections: polar covalent and nonpolar covalent. Furthermore, polar covalent compounds dissolve in water, while nonpolar covalent compounds do not.
Distillation Lab Report
1300 Words | 6 PagesAbstract — This experiment was conducted to familiarize the students with the procedures regarding distillation—to be more precise, the separation of ethanol from an alcoholic beverage—using a distillation set-up consisting of boiling chips, a Bunsen burner, a condenser, a thermometer and several other materials. In the end, it was discovered that one may actually separate a homogeneous mixture, given that the components of said mixture differ in volatility and that they utilize a complete distillation set-up and follow laboratory safety rules and regulations. Keywords — Matter, homogeneous and hetereogeneous mixtures, distillation, volatility, boiling point I. INTRODUCTION There are typically two categories of matter, these are pure substances
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