1)With 1-mL graduated pipet‚ measure 0.40 mL of the unknown labled “no.XX-.40 mL 2) With another 1ml graduated pipet measure 0.10 Ml of the unknown labled “no. XX- 0.10 mL” 3) Add the compounds to the same Erlenmeyer flask 4) Add 2.0 mL of 95% ethanol and 1.5 mL of 2 M sodium hydroxide solution to the flask 5)Stir with magnetic stirrer for 15 minutes or longer if precipitate still forming (if cloudy after 15 mina heat mixture on a asteam bath or in boiling water for 10 mins then cool
Premium Aldehyde Solvent Ethanol
Cheryl Baclit Chem 234 Experiment 4: Steam Distillation Introduction The purpose of this experiment is to extract Eugenol from Cloves using steam distillation as a purification technique and to transfer Eugenol from the aqueous phase to the MeCl2 phase. With steam distillation‚ the boiling point of a mixture of immiscible liquids is lower than the boiling points of the individual components. Water from the steam is one of the components of an immiscible liquid mixture. The vapor pressures of
Premium Water Distillation Laboratory glassware
Extraction of R’-NH2 For both of the organic acid and organic base extraction‚ the addition of the respective inorganic acid or inorganic base (HCl or NaOH) to the three-component mixture caused an immiscible appearance of the solution in the separatory funnel. By briskly shaking the separatory funnel with the mixed components created a build up of pressure which was released through the stopcock forming small disappearing bubbles within the tip of the separatory funnel. Once the funnel was placed
Free Acid Chemistry Laboratory glassware
Design an experiment to investigate the stoichiometric mole ratio of a chemical reaction. Present your data in terms of the mass of one reactant compared to the mass of one product. Purpose: The experiment will be designed to find out the stoichiometric mole ratio of Barium Chloride and Silver Nitrate yielding a precipitate of Silver Chloride in a Barium Nitrate solution. (BaCl2 + 2AgNO3 -> Ba(NO3)2 + 2AgCl) Research Question: How will the amount of Barium Chloride and Silver Nitrate
Premium Silver Erlenmeyer flask Laboratory glassware
4.2 Separation Techniques & Assessment of Purity By Grace Ngana |P3 |You have briefly written up what you did in measuring the melting point in 3rd person past tense. | Determining the melting point of aspirin • Firstly we turned on the melting point equipment; we referred to data tables for the actual value for the melting point of the aspirin. • Then we arranged the equipment to a point below the expected melting point we then noted that the rate of heating
Premium Titration Liquid Sodium hydroxide
What Affects the Rate of Evaporation? Aim * To find out if changes in temperature‚ draught and surface area of water open to air affects the rate of evaporation through the water. * To safely check if these variables change the rate of evaporation * To complete all the experiments in the short period given Prediction * I believe that a raise in temperature will speed up the rate of evaporation in the water * I believe that a larger surface area will speed up the rate of evaporation
Premium Water Evaporation Surface area
Part A- Additive Volumes First‚ obtain a dry 10 mL volumetric flask that includes a stopper with it and weight on a digital scale. Be sure to get the mass at the closest milligram. Then‚ pour DI water to the calibration mark of the flask. Place the stopper back and weigh it again on the same digital scale. Once recorded‚ it is okay to pour this water down the drain. Observations: Mass of Empty Flask Mass of DI Water Filled Flask 15.114 g 25.048 g Now‚ put 100 mL of ethanol in a beaker and
Premium Water Chemistry Oxygen
First‚ the weight of rats used in the experiment and the weight of the AVS022 and its components by weight of rats at various dose. Next‚ the herbs mixed with sterile water to the volume 40 ml/kg this the safety volume for oral administration140 and dispersed the herbs powder for easy feeding to the rats. The study of the effect of AVS022 and its components on pain and edema in rat used to the standard model as following Figure 4.1 Figure 4.1 Diagram for the investigation of the analgesic
Premium Rat Rat Inflammation
Proving the Beer Lambert Law Abstract: For this experiment we tested the absorbency of copper sulphate in different concentrations to prove the Beer Lambert Law. Introduction: This Law: Provides an experimental link between the absorbance properties of a solution of a given compound and its concentration. This is normally expressed as . A = Absorbance measured = Absorptivity C = Molar concentration L = Length of cuvette Equipment: • Gilson pipette • Eppendorf tubes • Copper sulphate
Premium Concentration Laboratory glassware Solution
First‚ the work area was sanitized with ethanol and paper towels‚ and the Bunsen-burner was lighted. The inoculating loops were sterilized by setting them above the cone of the flame to make the loop red‚ then left them to cool in the test tube tack for streaking. The media included a liquid (YED media that was made by 3g yeast extract‚ 6g anhydrous dextrose‚ 6g agar‚ and 300 mL tap water). The liquid media was on a hot plate‚ then an oven mitt was used to carefully transfer onto 4 petri dishes at
Premium Laboratory glassware Agar plate Petri dish