of magnesium metal in the bottom of the smallest tube. Place this test tube in the test tube holder. Using tongs pick up the large test tube and have it turned upside down‚ ready for the reaction. Place 6 drops of HCL into the small test tube with the metal. Immediately cap with the largest test tube and hold there until bobbling stops. Have another group member light a splint with the match and then blow it out. Quickly lift the test tube and put the glowing splint into the tube. Record observations
Premium Chemical reaction Hydrogen chloride Sodium
the causal variable of interest‚ the design is quasi experimental. o Quasi Experiments do not have internal validity because participants are not randomly assigned to conditions and the researcher may have no control over the independent variable. - Basic Confounds in Quasi Experimental Design are : o History o Maturation (Emotional‚ Physical & Psychological) o Mortality o Testing - One Group pretest-Post test design : o Poor research strategy because it fails to eliminate most threats
Premium Experiment Statistics Causality
very transparent yellowish color Precipitated a very light bluish color Conclusion: The purpose of this experiment is to work with aqueous solutions of ionic substances. Aqueous solutions are those solutions in which water is the solvent. When ionic substances are dissolved in water‚ the ions separate and become surrounded by water molecules. The focus of this experiment is on precipitates. The goal of this experiment is to study the nature of ionic reactions‚ write balanced equations‚ and to
Premium Sodium chloride Solubility Chemistry
Cebu Institute of Technology – University Cebu City PHYSICS DEPARTMENT Physics 201 – G01/M02 Name/Course/Year: Noel S. Alvarez BSIT – II Date Submitted: November 29‚ 2012 Experiment No. 1 Group No./Time/Day: 3 / 12NN-3PM/Thurs MEASUREMENT‚ ERRORS AND DENSITY I. Objective: a. To know the principles of good measurement and to compare the precision and accuracy of some commonly used measuring devices. b. To study the types‚ causes and effects of errors in measurement
Premium Measurement
Jews‚ experiments on them‚ and looting of their gold and property at the same time.
Premium World War II Germany Nazi Germany
Social Experiment Paper The Milgram’s Experiment The Milgram’s Experiment was conducted by Social psychology by the name of Stanley Milgram‚ he created this experiment on how being in the presents of an authority figures would affect the way people behaved. This study was conducted in July 1969‚ just one year after the trial of Eichmann in Jerusalem. Milgram developed this experiment to answer the question "Could it be that Eichmann and his millions
Premium Milgram experiment Stanford prison experiment Social psychology
Design of a Psychological Experiment Psyc 100 (0110-0129) Fall‚ 1996 Dr. Sternheim Report #1 (10 points) Problem: Suppose you are a psychologist who is interested in the effects of caffeine on the eye-hand coordination of students enrolled at UMCP. Design an experiment to test the hypothesis that caffeine enhances a student’s ability to hit a baseball. Describe your experiment by answering the following questions: 1) What are the independent and dependent variables? The independent variable
Premium Psychology Scientific method Statistics
The very first experiment had the hypothesis that the temperature of a burner flame can be controlled by adjusting the ratio of gas to air in the mixture to be burned. During this experiment‚ my partner and I gathered our materials of the paper matches‚ straight pins‚ copper wire‚ laboratory burners‚ rubber tubing‚ tongs‚ and evaporating dish. Making sure we had our safety goggles on and the material we needed‚ we connected the Tirrill burner into the gas and lit the burner with the match‚ having
Premium Hydrogen Oxygen Temperature
* Bibliography............................................................................................... Aim: The aim of the experiment that was carried out was to see‚ at what temperature and in which standard solution‚ does the amount of dye left in the boiling tube had the highest percentage transmission. Beetroot was used for the experiment because it was easier to see the dye after the practical was completed. Putting beetroot cylinders into different boiling tubes‚ which contained
Premium Water Distillation Cell
Title Antimicrobial properties in different type of plants. Introduction A substance that kills or prevents the growth of microorganisms for example bacteria‚ fungi or protozoans is called an antimicrobial. This substance has 2 major roles which are to either kill microbes (microbiocidal) or prevent the growth of microbes (microbiostatic). Disinfectants are antimicrobial substances used on non-living objects outside the body. This substance included antibiotics‚ antifungals‚ antiprotozoals and
Premium Bacteria Agar Antimicrobial