HSC Chemistry First Hand Investigation 2009 Scientific Report Aim: To carry out a fist hand experiment in the extraction of red cabbage pigment‚ use this extracted pigment to standardize against know pH’s‚ test 5 household items to determine the possible pH of these items by using the standardization and assess the pigment’s ability to be used as a Universal Indicator. Risk Assessment: When dealing with fire‚ the Bunsen burner should always be switched to the safety flame before lighting.
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(part b)‚ and the formation of Magnesium Oxide (part c). 200 mL of deionized water were added to a beaker followed by the addition of 100 mL 6 M HCl‚ which reacted to make 300 mL of a 2 M HCl solution used for Part B. Next‚ 50 mL of deionized water were added to a separate beaker and then 100 mL 3 M NaOH were added to the beaker to form 150 mL of a 2 M NaOH solution for Part C. While the two solutions cooled down‚ the LabQuest was set up to collect data for the three reactions from Part B. For Part
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Titration Lab of NaOH and KHP Aim: To titrate Sodium Hydroxide with Potassium Hydrogen Phthalate . To also determine the concentration of NaOH in the KHP solution. Hypothesis: When KHP is added to the solution of NaOH and the indicator‚ the solution will turn clear and neutralize. The concentration of NaOH is going to be very low because it is diluted. Materials required: pipette filler‚ volumetric flasks(2-4)‚ beakers(2)‚small white piece of paper‚ indicator( 2 drops)‚ conical flask‚ clamp
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an 0.1 M solution of NaOH. This was done by diluting from the 6 M solution that was provided. Next‚ 0.715g of KHP was weighed using the glazed paper and the triple beam balance. The KHP was then transferred to the 250 mL Erlenmeyer flask. Using a graduated cylinder‚ 50 mL of deionized water was measured and added to the flask. The KHP was dissolved in the water‚ and few drops of phenolphthalein were added. Moreover‚ the burette was rinsed with deionized water‚ then with NaOH solution. Then‚ it was
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Red Cabbage Indicator Experiment Aim: The aim of our investigation was to identify and understand how different chemicals (Acids‚ alkalis and neutral) react and experience a change in colour due of this. Introduction: The red cabbage indicator shows how a usual household product such as red cabbage can make a suitable indicator and be able find out if a chemical is either and acid‚ alkali or neutral. Acids are a chemical that reacts with an alkali neutralising it producing water
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VIBRATIONAL-ROTATIONAL SPECTRA OF HCl Physical Chemistry Laboratory II‚ CHEM 3155.001 April 20‚ 2012 Introduction and Objective The experimental objective of this lab was to collect an IR spectrum of gaseous HCl and from it the experimental rotational constant‚ B‚ and fundamental vibration frequency‚ v0‚ can be calculated(1). The concept of infrared spectroscopy deals with the infrared region of the electromagnetic spectrum. Molecules absorb at specific resonant frequencies that are characteristic
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THE EFFECTS OF Brassica oleracea L. var. capitata L. EXTRACT ON THE SPERM QUALITY OF Mus musculus A Research Presented to the College of Arts and Sciences Our Lady of Fatima University In Partial Fulfillment of the Course Requirements for the Degree Bachelor of Science in Biology By MARLIZA A. ARIÑAS JAMEE LORRAINE M. DELA ROSA GILBERT H. DIPACULANG JR. March 2013 Chapter 1 THE PROBLEM AND ITS BACKGROUND This chapter gives an introduction and background on the study. This chapter
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drops of TEA‚ afterwards two distinctive phases were formed. pH value of supernatant was measured quickly (pH-meter showed number 11-12). The reaction flask was heated and shaken for 30 minutes‚ followed by decantation to obtain base Memantine (without Hcl). The reaction flask was connected to rotary evaporator equipped with vacuum pump to remove excess solvent (i.e.‚
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Infra-Red Spectroscopy of HCl and DCl gas Abstract Fourier-transform infrared spectroscopy has been very useful in helping scientists examining molecules of HCl and DCl. Because deuterium has a greater mass than hydrogen‚ the IR band shown for HCl is at a higher wavelength than DCl. The absorption of light in DCl was at lower frequency 1700-2200 cm-1 because D is bigger and heavier. That’s why the vibrations on the IR were shorter for DCl compared to HCl. The stretching of HCl on the IR
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Chemistry SL! Research Question! How is the solubility of sodium hydroxide (NaOH) in water affected by temperature? ! ! Introduction ! Sodium hydroxide is categorised as metal halide salt‚ composed of sodium and chlorine.! The ions present in the solid crystals of potassium chloride dissolve and gain mobility in water. When potassium chloride is dissolved in water‚ the following endothermic reaction occurs:! NaOH(s) + H2O(l) → Na+(aq) + OH–(aq) + H2O(l)! This reaction takes place because
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