Laboratory# 26 Group 2: The Alkaline Earth Metals Period E Bautista‚ Angel Table D Comer‚ Tyler 3/22/12 Sullivan‚ Brittany Truong‚ Phuoc Conclusions and Questions 1. Step 1: Ca(s) +H2O->Ca (OH)2(aq)+H2(g) Step 4: Mg(s) +H2O->Mg (OH)2(aq)+H2(g) Step 10: CaSO4 + H2O-> Ca(OH)2 + H2SO4 MgSO4 + H2O ->Mg (OH)2 + H2SO4 Barium Sulfate: No reaction Step 13: MgCl2 + Na2CO3 -> MgCO3 + 2NaCl CaCl2 + Na2CO3 -> CaCO3 + 2NaCl
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Heat Treatment and Qualitative Metallographic Analysis Lab ME 3228: Mechanics & Materials Laboratory Summary Comparing a material’s initial treatment and the microstructures that are formed from different processes‚ an engineer can accurately understand why certain treated materials of the same family can be stronger than another. In this experiment annealed and cold-worked specimens of AISI 1018 STEEL are used‚ along with a Hardness tester‚ a grinding and polishing process‚ and a micrograph
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LAB REPORT Introduction: In a chemical change‚ the identities of substances change and new substances form. In an equation the substances on the left are the reactants. The substances on the right are the products. In this experiment the objectives are to observe evidence that a chemical change has taken place. Infer from observations that a new substance has been formed. Identify and record observations that show energy is involved in chemical change observe the color‚ solubility of some substances
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Name: Andre Davis Lab Partner: Ariana camper Title: Lab 21 Qualitative Analysis Date: April 11‚ 2017 Objective: The goal for this lab was to take the unknown solution and determine its ions. Experiment Procedure Part 1 Group 1 10 drops of an unknown solution into a test tube. add four drops of 6M HCl‚ then stir it and place in centrifuge for 30seconds to a minute. Test for completeness of precipitation after testing for precipitation add one drop no more than one drop of 6 M HCl to the supernate
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cheese. Lactic acid bacteria(LAB)‚ a bacteria that can be found in the production of cheese‚ its stress gene was investigated in the experiment by using various biochemical and genetic techniques to identify and extract. The characterisation of the strain illustrates how identification of strains differ using different methods‚ such as gram stain and 16s rRNA screening. After the characterisation‚ the stress gene isolation assist the further understanding of the gene on LAB be giving different stress
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Measurement and Density Your Name: ____________________________________________________________ __ Purpose of this Lab What is the goal of this lab? What question are you trying to answer‚ or what problem are you trying to explain? Hypothesis After reading the lab instructions - but before starting the lab - record your best “educated guess” about each experiment: Experiment 1: Which method of finding the density give you the least percent error and why? Experiment 2: After completing the
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Essay Assignment 3: Critique (Rhetorical Analysis) For your third paper assignment‚ write a critique of an article of your choice that has met my approval from TSIS or if you have a more sophisticated article you wish to choose you may seek my approval for that as well. In the two previous writing assignments‚ you engaged in summarizing and synthesizing. Those two skills‚ respectively‚ allow you to report the ideas of others concisely and to relate the information found in several sources
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’’? Describe what metal speciation is. How do the master variables of the environment relate to speciation? Why is speciation important in contaminant transport and in biological contexts? If you had to pick a third “master” variable‚ what would it be? Why is chemistry vital to understanding biological systems? Species refers to the form that a metal takes in the environment. This form can be a cation (ex: Fe2+) or anion form (ex: N3-)‚ or just a bonded form (ex: Fe2O3). Metal speciation‚ then‚ refers
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October 13‚ 2012 Needle through a Balloon Pre-Lab Preparations: Purpose: The purpose of this experiment is to see if the balloon pops when pierced with a wooden skewer or a sharp pin. Hypothesis: If we lubricate the skewer with petroleum jelly‚ then it should go through the balloon without popping. Hypothesis for the 2nd part of the Lab: If we cover the side of the balloon with cellophane tape‚ then it will not pop when pierced with the pin. Materials: • Balloons • Long wooden
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synthesized 2‚ 3-dioxo-1‚ 2‚ 3‚ 4-tetrahydro quinoxaline-6-sulfonyl benzimidazole (s) were performed on adult earthworm (Pheretima Posthuma). The observation was made for the time taken to paralysis and/or death of individual worms up to four hours of the test period. Paralysis was said to occur when the worms did not revive even in a vehicle. Death was concluded when the worms lost their motility followed with fading away of their body color. The selected newly synthesized 2‚ 3-dioxo-1‚ 2‚ 3‚ 4-tetrahydro
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