Table 1: Benzoic acid (50%) | Benzoin (40%) | Dibromo-benzene (10%) | (3) | (4) | (5) | Procedure: 1) Dissolve 1.0 g of the mixture in methylene chloride in a centrifugal tube 2) Set up the separatory funnel. 3) In order to extract the benzoic acid add 5.0 ml of the 1 mol NaOH solution‚ then shake the funnel 1 time per second and open it while it is upside down to allow the pressure out. 4) Allow the solution to settle. 5) The NaOH layer will extract the benzoic acid
Premium Solvent Erlenmeyer flask Sodium hydroxide
Review for First Quarter Exam AP CHEMISTRY List of topics – Chapters: review‚ 1‚ 2‚ 3.1 and 3.2 1. Scientific Method 2. Significant Figures 3. Calculation with significant figures 4. Uncertainty 5. Density problems 6. Density Graphs interpretation 7. Dimensional Analysis 8. States of Matter 9. Classification of matter 10. Separation techniques 11. Structure of the atom a. historical development: Democritus; Aristotle; Dalton (postulates‚ law of definite proportions‚ law of multiple
Premium Atom Quantum mechanics Photon
Silveira Date of Submission: September 25‚ 2013 Lab Section: CHE110L*Z Purpose The purpose of this experiment is to use two common laboratory methods to see how mixtures can be separated based on physical properties. Paper chromatography will be used to separate the dye colors from M&M candy to see which colors contain yellow #5. Gravimetric separation will be used to separate salt and sand from a mixture. Procedure The procedure for this lab can be found on pages 16 – 30 in “General Chemistry
Premium Mixture Chromatography Separation process
acid solution would be titrated by slowly adding drops of solution into NaOH‚ and the volume of base needed to react with the acid is measured throughout. By using those data‚ the students are able to find what they were trying to calculate. On this lab‚ the students found the unknown acid‚ 4.36 x 10-5‚ and the equivalence point of 8.4‚ as well as the value of pH. Purpose: The purpose of the experiment was to utilize the techniques of titrations to measure the concentration of an acid or base in
Free PH Sodium hydroxide Titration
reaction for another reaction using Hess’ Law and to determine heats of dissolution for a number of ionic salts that will be used to predict lattice energy again by using Hess’ Law. Heat may increase during experiment and undergo exothermic reaction. Analysis: Q = m c (Tf - Ti) = 27.9°C – 21.3°C = 6.6°C Q = (101.81g)(4180kJ/g°C)(6.6°C) Q = 2808734 kJ Discussion: Measurements were relatively accurate and closely linked to quantitative values. When measurement was a little higher‚ value resulted
Free Thermodynamics Enthalpy Measurement
October 1‚ 2013 Chemical Reactions of Copper Objective The objective of this lab is to convert copper (Cu0) “in a series of reactions to various compound containing copper as the Cu2+ species” (CHM111 Laboratory Manual) in order to prove the Law of the Conservation of Mass. Introduction In this experiment‚ we took a look at how copper (Cu0) reacts with different substances to get an end result where it is transformed back to its original state. There were five different reactions that involved
Premium Chemistry
Experiment #: 2 Date : October 5‚ 2012 Topic : Ecology Aim : To conduct a complete an ecological survey of the Lime Cay including a study of the: 1. Man’s Impact on the Environment 2. Echinoderm Distribution 3. Mangrove Distribution 4. Rocky Shore Habitat Background Information: Lime Cay‚ the man islet of the Port Royal Cays‚ located 17 degrees north and 76 degrees west‚ is one of the many cays in Jamaica. By definition‚ a cay is a small low elevated sandy island formed on the
Premium Caribbean Ecology Atlantic Ocean
Determining the Melting Point of a Substance Purpose The purpose of this lab is to determine the melting point of the substances naphthalene‚ biphenyl and a mixture of C. Data/Observation Sample | Melting Point Range (°C) | | Accurate trialStart Done | Naphthalene | 81 | 85 | Biphenyl | 71 | 73 | Mixture C | 42 | 56 | Questions: 1. The effect of the impurity on the mixture caused the melting point of the mixture to be lowered. 2
Free Solid Liquid
Name: |Date:| Exp 10: Caloric Content of Food|| Your Data: |First Item|Second Item|Third Item| What Food are you using|||| |||| Mass of empty beaker|||| Mass of beaker and water|||| Net Mass of the water|||| |||| Initial mass of food and holder|||| Final mass of burnt food and holder|||| Net Mass of the burnt food|||| |||| Initial temp of the water|||| Final temp of the water|||| ∆ T in C (change in temperature)|||| Calculations: Show your numbers in the following calculation
Premium Energy Heat Thermodynamics
Column and thin layer chromatography of plant pigments CHEMISTRY 201L EXPT 04 PAGE 01 - 12 Noel Angelo P. Kalacas*‚ Hanna Mae Laluces‚ Ina Bianca Lanuza Department of Chemistry‚ College of Science *Corresponding author; e-mail: knight_BeNcH66@yahoo.com Abstract Chromatography is a powerful technique for separating and/or identifying the components in a mixture. There are different types of chromatography and each has its own strengths and weaknesses. In this experiment‚ pigments of the
Free Chromatography Thin layer chromatography