Purpose: The purpose of this lab was to determine the freezing point of pure water‚ the experimental van’t Hoff factor for a substance and the molar mass of an unknown solution. Reagents: 25mL deionized Water ¼ to ½ inches of rock salt 25mL Sodium Nitrate (NaNO3 ) 25mL unknown solution – handle unknown solution carefully Procedure: For part 1‚ the freezing point of deionized water was determined. An ice bath was prepared by filling a 600mL beaker ¾ full of ice and covered with ¼ to
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Experiment #1: Introduction to Experimentation Submitted by: Neann Klara M. De Jesus BS Psychology II Submitted to: Dr. Geraldine E. Tria ABSTRACT SUMMARY The first experiment done by the class was called “Introduction to Experimentation”. Its main objective is to give basic knowledge about some of the logic of experimentation. The class was divided into groups of 2. In each group there was an experimenter (E) and a subject (S). The experimenter instructed
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LAB REPORT FOR EXPERIMENT #2: PURIFICATION OF ACETANILIDE BY RECRYSTALLIZATION Your name TA’s name Your Partner’s name Lab Section OBSERVATIONS: A. SELECTING A RECRYSTALLIZATION SOLVENT | |Solubility Test (cold) |Solubility Test (hot) | |Water |insoluble |soluble | |pet ether |insoluble
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EXPERIMENT 5 REDOX TITRATION: TITRATION USING SODIUM THIOSULPHATE Objectives 1. 2. To prepare a standard solution of potassium iodate for use to determine the concentration of sodium thiosulphate solution accurately. To acquire the proper techniques of carrying out a titration. Introduction Redox titrations using sodium thiosulphate as a reducing agent is known as iodometric titration since it is used specifically to titrate iodine. The reaction involved is: I2 + 2Na2S2O3 I2 + 2S2O322NaI + Na2S4O6
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Experiment : 1 Tittle : Preparation of bis(acetylacetonato)copper(II) complex Objective : To synthesis the bis(acetylacetonato)copper(II) complex Introduction : A complex ion is usually form with high charge density metal ion as a central and formation of coordinate covalent bond (dative bond) with high electron molecules or ions. These molecules or ions are functioning as ligands (electrophile in organic compounds). They are easily attracted by electrophile (electron deficiency
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ancient times. Copernicus‚ Galileo‚ and Newton were all major figures hope not only helped change the mind set of individuals during their time but also helped shaped the future for modern technology and science. This revolution took place throughout many nations of Europe. This revolution changed the ideas and teachings
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Galileo was contributed a lot to us today because he had major discoveries in math‚ astronomy‚ physics and engineering. Even though he had an unideal childhood‚ Galileo went to college at the University of Pisa. He also began teaching at the age of 17. In 1568 he invented the hydrostatic balance. this is used to measure the “specific gravity” of a gemstone. This is something that people use today in gemology. He also gave private math lessons to children in florence and his college. In 1593‚ Galileo
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Galileo and Copernicus were two extremely influential astronomers. They believed in the heliocentric model of our solar system‚ or the idea that the planets revolved around the Sun. We all accept this model today as fact‚ but back in their time‚ the thought of it was pure blasphemy. The widely accepted idea at the time‚ as supported by the almighty Catholic Church‚ was the geocentric model. In this model‚ the Earth is central to nearly everything‚ and is orbited by the Sun‚ moon‚ and other special
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________ Name: Loren B. Matulac Date : November 09‚ 2013 Yr. & Section: IV- Perseverance Teacher: Mrs. Pacita J. Yapsangco “Magnetic Field of a Coil” Experiment 2.5 I. Objectives: To produce a strong magnetic field just by looping the wire into coils II. Materials: 6 V or 9 V batteries 50 cm of bare 12- gauge copper wire Stiff cardboard and scissors Wooden dowel (about 15 cm long x 4 cm
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Test Biuret Test Reagents CuSO4 sol’n‚ diluted NaOH Test for Intact proteins and protein hydrlysates (at least tripeptide‚ 2 peptide bonds Result Pink to violet blue color Ninhyrin Test 1‚2‚3-indanetrione monohydrate or triketohydintene hydrate‚ ethanol Alpha- amino group (usually a general test for amino acids) Xanthoproteic Test Conc. HNO3‚ conc. NaOH For W‚F‚Y (aromatic except for H) Blue to blue-violet Oxidative decarboxylation color & deamination
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