Iron (III) Nitrate‚ 0.1 M - 2.5 mL in Pipet‚ 1 Nickel (II) Nitrate‚ 0.1 M - 2 mL in Pipet‚ 1 Sodium Bicarbonate‚ 0.1 M - 2 mL in‚ Pipet‚ 1 Sodium Carbonate‚ 0.1 M - 2 mL in Pipet‚ 1 Sodium Chloride‚ 0.1 M - 2.5 mL in Pipet‚ 1 Sodium Hydroxide‚ 0.1 M - 2 mL in Pipet‚ 1 Sodium Iodide‚ 0.1 M - 2.5 mL in Pipet‚ 1 Sodium Phosphate‚ 0.1 M - 2 mL in Pipet‚1 Sodium Sulfate‚ 0.1 M - 2.5 mL in Pipet CAUTION! Sodium hydroxide is caustic and can burn skin and clothes if it touches them. Rinse any spills well
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Enzymatic Assay of TYROSINASE (EC 1.14.18.1) PRINCIPLE: L-Tyrosine + O2 L-DOPA Tyrosinase Tyrosinase > L-DOPA > L-DOPA-quinone + H20 Abbreviation used: L-DOPA = L-3‚4-Dihydroxyphenylalanine CONDITIONS: METHOD: REAGENTS: A. 50 mM Potassium Phosphate Buffer‚ pH 6.5 at 25° C (Prepare 50 ml in deionized water using Potassium Phosphate‚ Monobasic‚ Anhydrous‚ Sigma Prod. No. P5379. Adjust to pH 6.5 at 25° C with 1 M KOH.) 1 mM L-Tyrosine Solution (Prepare 100 ml in deionized water using L-Tyrosine
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Experiment #8: Limiting Reactant Abstract In chemical reactions‚ the significance of knowing the limiting reactant is high. In order to increase the percent yield of product‚ increasing the limiting reactant‚ possibly‚ is the most effective. In this experiment we were able to calculate limiting reactants from the reaction of CaCl2. 2H2O + K2C2O4.H2O(aq). As a group‚ we obtained our salt mixture of calcium chloride and potassium oxalate‚ and weighed the mixture. We were able to make an aqueous
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Safety Precautions for Synthesis of Acetic Anhydride Acetic Anhydride Acetic anhydride is an irritant and also flammable‚ therefore gloves and goggles should be worn at all times during the experiment. It is reactive to water‚ so in the case of fire‚ alcohol foam or carbon dioxide is preferred to use as an extinguisher. This chemical has harmful fumes and use of a fume hood is strongly recommended. Sulphuric and Salicylic Acid These acids may irritate the skin in high concentrations. Take
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1) Who should be immediately called for assistance in case of an accident in the laboratory? Your laboratory instructor. Your instructor should be trained to assist with emergency first aid until qualified medical assistance arrives. 2) What must be worn in the laboratory at all times to decrease the likelihood of an eye injury? Goggles or approved glasses. Contact lenses should be worn only with GOGGLES or FACE SHIELD. Anything getting under a contact lens will not wash out unless the lens
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Unit 4: Basic Stoichiometry Rocky Mountain Poison and Drug Center Case Study DUE _________________________________ at Midnight All Sections are a level 3 Title and Date Is it present Identifies the independent and dependent variables. Describes the independent and dependent variables. Problem (level 3) Complete sentence (if a problem‚ in question form) Identifies the independent and dependent variables. Describes the independent and dependent variables. Case
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Andrea Moreno 4 September 2015 Block B Calculations: There are no calculations. Analysis/ Critical Thinking Questions: Compare your data for the pure substances with the data for each of the two solid mixtures. Which of the pure substances shows behavior that is similar to what you saw with the the two-solid mixtures (Mixture 1 and Mixture 2)? If you cannot positively identify your mixture‚ discuss the possibilities for the mixture. The starch and mixture 2 are both similar because they both did
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| Percent Yield Lab | | | | 4/20/2012 | Mrs.Sardella Per4 Matt ‚ Kait Mrs.Sardella Per4 Matt ‚ Kait | Introduction *Limiting Reactant: A reactant that is completely consumed during a chemical reaction‚ limiting the amount of product that is produced. *Excess Reactant: A reactant that remains after a reaction is over. *Theoretical Yield: The amount of product that is predicted by stoichiometric calculations *Actual Yield: The amount of product that is recovered
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Discussion: In the first part of the experiment‚ chronoamperometry was used to determine the diffusion coefficient of ferricyanide. The chronoamperogram can be seen in Graph 1. The chronoamperogram shows three distinct regions. [1A] Region “a” is where the electrode potential is higher than the ferricyanide’s potential‚ so no reduction reaction takes place. Region “b” is where the potential is decreased to a potential much lower than that of ferricyanide. This results in the ferricyanide consuming
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CH201L S.Y. 2014-2015 Analysis of Oxygen-Bearing Organic Compound 2 BS Chemistry‚ College of Science‚ University of Santo Tomas Espana‚ Manila Philippines 1015 Abstract An unknown sample was given along with five standards to test the presence of oxygen in the sample. The unknown sample underwent five different chemical analysis namely Dichromate test‚ Tollen’s test‚ Lucas test‚ DNPH test‚ and Iodoform test. Each test will determine if the unknown sample will have the same reaction as
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