Introduction: This lab is designed to provide the student with experience in understanding the principals of acid/base neutralization and to develop the laboratory skill of titration. Procedure: 1. Gather materials: 0.20 M HCl solution‚ 0.20 M NaOH solution‚ 50 ml burette‚ bromophenol blue‚ 150 ml flask‚ electronic scale‚ tripod stand‚ motor and pestle‚ Bunsen burner‚ Tums tablet‚ Rolaid tablet‚ and Equate tablet. 2. Weigh antacid tablet as a whole on the electronic scale and record the data
Premium Sodium hydroxide Weight Mass
Chemical Equilibrium Lab Report Aim: The aim of the lab “Chemical Equilibrium” is to observe the effects of changes in concentrations of products and reactants on the position of the equilibrium of given chemical reactions. Background Information: We are going to use our knowledge of the Le Chatelier’s principle in order to observe this experiment. The principle states that the equilibrium will shift in the direction that will minimize the effects of the change. This lab consists of two
Premium Chemical reaction Change Chemistry
rack dropper bottles of 1% starch‚ 1% protein‚ 1% glucose‚ and distilled water (DW)‚ slurries of honey‚ egg white‚ and saltine crackers dropper of IKI solution (starch test) dropper bottle of Benedict’s reagent (glucose test) dropper bottles of 10% NaOH and 2% CuSO4 (Biuret Reagents – protein test) 95ºC water bath masking tape for labeling test tubes Procedure: Biuret test for a typical protein: Place a small piece of masking tape on 7 clean test tubes. Using a permanent marking pen‚ label
Premium Carbohydrate Glucose DNA
with 6 M NaOH. Suck up these chemicals into their labeled pipets for later use. 2. Perform the following steps on each of the substances to be tested. Complete all tests of one substance and record your observations before proceeding to the next. a. Place 4 small test tubes into wells of the 24-well plate. b. Place small amounts of the substance to be tested in each of the four micro test tubes. 3. First test tube: a. Examine and record color and odor. b. Light the burner
Premium Chemistry Chemical reaction Hydrogen
BICH 172 – Introductory Biochemical Laboratory Worksheet 10 - DNA Melting Curve Course Code: BICH172 Course Name: Introductory Biochemical Laboratory Student Name: CHUNG YUK MAN EMILY Student ID: 10198465 Group Number: 10 Date of Experiment: 16th November 2010 Q1. State the experimental aim and describe the term “hyperchromic effect”. (2 mark) The experimental aims are to study the basic structural characteristic of DNA molecules through UV spectrum
Premium DNA
The solutions that been used in this experiment is dilution of 0.1M of sodium hydroxide‚ NaOH and 0.1M of ethyl acetate‚ Et(Ac) to 60L. There are four common measures of reactor performance and the most important one is conversion. Then the speed is set to be at 300rpm and reading is taken every 5 minutes till the outlet conductivity remains constant. From the conductivity measured‚ the exit concentration of NaOH and the conversion percentage can be calculated by referring to the calibration curve plotted
Premium Fluid dynamics Reaction rate Mass flow rate
separate test tubes. 3. Shake and observe the solubility‚ then test the solution with litmus paper if soluble. 4. Repeat the experiment using ether and ethanol as the solvent. 9.2 Reactions with Bases 1. Prepare 3 test tubes with 3 drops of 5% NaOH. 2. Add 5 drops of 50 mg of acetic acid‚ benzoic acid and oxalic acid. 3. Shake and observe the changes. 4. Repeat the procedures using 5% NaHCO3. 9.3 Oxidation Reactions 9.3.1 Reaction with KMnO4 1. Prepare 4 test tubes with 2 ml of water
Premium Acetic acid Carboxylic acid
that as the volume of vinegar is increased‚ the amount of sodium Hydroxide required will neutralise will the acid to change it to a pale pink. Method 2.1 Materials * Diluted vinegar solutions (labeled ‘A’‚ ‘B’‚ & ‘C’) * Standardized 0.1M NaOH solution * 10 mL pipette * Phenolphthalein indicator‚ * Retort stand and burette clamp * Small funnel * 100 mL beaker * 150 mL conical flask‚ * Wash bottle * Pipette filler 2.2 Variables Independent (volume of
Premium Sodium hydroxide Titration
weight of the unknown was determined. The unknown carboxylic acid was titrated with 0.1 M NaOH. The solid was synthesized from the Grignard reaction. Deionized water and ethanol were both used to dissolve the solid. Then 2-3 drops of phenolphthalein were added to the Erlenmeyer flask as the indicator. Under acidic conditions from the unknown carboxylic acid‚ the indicator did not change colors. The titrant‚ NaOH‚ which is a strong base was added to the solution dropwise until the solution remained a
Premium Temperature Water Liquid
Chemical Equilibrium: Le Chatelier Principle By Sarah Ramos and Kristina Todorovic Chemistry 203 DEN Dr. Mohamed El-Maazawi Part A. Acid-Base Indicators Purpose In this part of the experiment‚ we will find a reagent that will shift the acid-base equilibrium reaction described by Equation (2) in one direction and then a second reagent that will cause the equilibrium position to shift back in the opposite direction. Introduction An acid–base indicator
Premium Chemical equilibrium Solubility PH