Cabbage Patch Lab In this week’s lab, I had to determine the pH of several liquids. My question was “How acidic or basic are each of the liquids?”. Indicators are compounds that change color at a specific pH level when added to a substance. The indicators I used in this lab were cabbage juice and litmus paper. Now that I have a question and background information, I can move on to form a hypothesis. I had 5 different hypotheses for each of the liquids. If I dip the litmus paper in the distilled
The production of acids lowers the pH of the media. After incubation, methyl red indicator is added to the medium for the test of production of mixed acid. If the color changes to red, then the test is said to be positive for the production of mixed acids, if the color changes to orange, the result is inconclusive
What is a Ph Scale? A pH scale is the measure of acidity or alkalinity of a substance that is water soluble. On a pH scale the substance is rated with a pH value, which is a number from one to fourteen, with seven as the neutral point. If the value of such substance is below seven then this concludes the substance has acidity which increases as the pH value decreases. One on a pH scale is the most acidic. If the pH value is above seven this indicates that the substance contains alkalinity which will
A pH meter is an instrument or device which measures acidity or alkalinity of a fluid. pH meter is a suitable instrument for measuring the pH of a solution because it is quick and simple to use. The instrument contains few buttons to operate so the end result will be given quickly displayed on the pH screen. The results are precise and it is correctly calibrated. The meter is portable and it can be used
Sulphuric acid is considered a strong acid, as it is completely in the form of ions in dilute solution. * Sodium carbonate is a weak alkali as it only partially forms ions in dilute solution. * For this titration methyl orange is the best indicator for the end point between a strong acid and weak alkali. [IMAGE]Na2CO3 (aq) + H2SO4 (aq) Na2SO4 (aq) + CO2 (g) * One mole of sodium carbonate is needed to neutralise one mole of sulphuric acid so it in a 1:1 ratio for moles
The Relative Formula Mass of an Unknown Acid Table of contents 1.1 Aim of the experiment 2 1.2 Introduction 2 1.3 Equipments and apparatus 2 1.4 Safety precautions 2 2.1 Procedure 3 2.2 Apparatus setup 3 2.3 Analysis 4 3.1 Implementing 5 3.2 Analyzing 6 4.1 Evaluation 8 4.2 Comparison between experimental Mr with value
Determining the Identity of Unknown Substances by using the Rƒ Factor found with Chromatography Paper Purpose To separate molecules that are attracted to one another using the principles of intermolecular forces as well as a scientific ratio to find the identity of unknown substances. Theoretical Background Chromatography corresponds to the solubility of substances in a mixture, as well as, its ability to separate in different solvents. The level of separation is measured by a relative
Introduction The purpose of our lab is to find the red cabbage pH indicator; you must know the acids and bases of the solution to find the indicator. Anthocyanin pigments in red cabbage can be used to determine the pH of a solution based on the color it changes to. In order to determine the pH indicator for the red cabbage you must find the pH values of those solutions from the liquid dyes, also known as the pH indicators. Literature Review Acids and Bases Acids and Bases can be very similar
Apparatus and equipment: · Burette (50cm3 ) · 2 x Glass Pipette (25cm3) · Rubber Pipette filler · Standard Volumetric Flask (250cm3) · Glass funnel · 2 X Beakers (100cm3 ) · Clamp Stand and clamp · White Tile · Methyl Orange Indicator (bottle) · Dropping pipette · Conical flask (500cm3) · De-ionised Water in delivery bottle · HCl acid (plentiful amounts) · Lime Water (plentiful amounts) · Stoppers to seal bottles · Lab coat and safety goggles Hannah Brougham
Volumetric Analysis and Accuracy Introduction: The purpose of this lab in to increase awareness of accuracy of the equipment that you are using in the laboratory as well as systematic and random errors. Through the titration of hydrochloric acid with standard anhydrous sodium carbonate the accuracy of the equipment was tested to discover the difference in concentration over the five trials conducted. Method: The method that was given in the Chemistry 306 Laboratory was followed from page 14 –
distilled water and mixed thoroughly. Titration Procedure A burette was filled with the standard sodium carbonate solution. Using a pipette, a measured volume of hydrochloric acid was transferred into a conical flask. A few drops of methyl orange indicator were added to the hydrochloric acid solution. The burette was then slowly titrated with the sodium carbonate solution until the endpoint was reached, which was indicated by a colour change from pink to yellow. The volume of sodium carbonate solution
NaCl in solution, and molarity formula to be 0.0140 mol/L, the molality was calculated to be 0.0143, and the PPM was calculated to be 833. The experimental value for molarity, obtained through titration using AgNO3 as a titrant with Ag2CrO4 as an indicator, was averaged over three trials to be .01523 mol/L. Comparing experimental and actual values gave an estimated standard deviation of 0.00032 M with a confidence interval of +0.00079 at 95% and +0.0018 at 99%. The percent error for molarity was
which contains approximately 1g/dm3 of calcium Hydroxide. This hypothesis from www.studentcentral.co.uk We were also give Hydrochloric acid (HCl) with a concentration of 2.00 mol/dm3 normal laboratory apparatus was also given and so was an indicator. jenny_eli, please do not redistribute this project. We work very hard to create this website, and we trust our visitors to respect it for the good of other students. Please, do not circulate this project elsewhere on the internet. Anybody found
The objective of part A was to determine the rate of the substitution reaction between 1-Chlorobutane and KOH. This information was obtained by using the titration method to record the concentration of KOH over a given amount of time. To start this procedure, 1-Chlorobutane was added to a round bottom flask, which was connected to a reflux apparatus. Once it was observed that reflux had started the KOH was added with EtOH; this is the start of the reaction. The aliquot was then titrated with 0.100
Vanessa Mendez Unknown# 26 Lab Practicum Report Results: The carbohydrate procedure was done due to the fact that my unknown represented a carbohydrate result by doing the Molisch Test. A TLC test was done to verify it was not an amino acid which proved to be negative. The Mucic Acid, Molisch, Bial's, Seliwanoff, Benedicts, and Barfoed's test was done to see the characteristics to help identify my unknown. Mucic acid test contained 100 mg of unknown, and 1 ml of HNO3 , and water which were heated
Analysis/Conclusion Based on our observations during the separation techniques and some speculation, we were able to identify eight components of our mixture: graphite from the filtration residue, Epsom salt from crystallization, water and acetic acid through distillation, red and orange dye, iron metal, marble chips, and sand. To start with, the first separation technique we performed on the heterogeneous mixture was filtration. According to our observations of the residue, we believed graphite
hydroxide, Ca(OH)2, in water. I have to make up a solution of calcium hydroxide and carry out a titration using hydrochloric acid solution of the chosen concentration. The equipment need is as below: · Solid calcium hydroxide · Methyl orange indicator · Volumetric flask (250cm3) · Clamp and boss · Clamp stand · Burette (50cm3) · Conical flask · Pipette (25cm3) · Pipette filler · Distilled water · White spotting tile · Hydrochloric acid of chosen concentration ·
Name: Zachary McMorrough. Lab Partner: Don’t need. Course: CHM 120 Lab Section 1. Title: Copper from Start to Finish: A Sequence of Chemical Reactions. Date: 10/8/2015 Purpose: The purpose of the lab was to perform a series of chemical reactions in order to transform copper within different reactions in order to start and end with solid brown copper. Pre-Lab Questions: a. The acid is toxic when combustion occurs and can be harmful if inhaled. b. Acids become much more toxic and lethal when concentrated
Three drops of the indicator, phenolphthalein, was added to the flask containing the dissolved KHP. The burette was then filled with ~0.25 M NaOH, using a glass funnel, and a small amount was drained in order to remove the remaining air from the tip. The initial volume of the
However, there is no color change at end point of these reactions, so an indicator had to be added into the solutions to indicate the end point. An indicator is a chemical which is used to indicate the presence of the another substance in the solution; it changes colors when the ions H+ are added or removed by dissociation reaction. In this experiment, phenolphthalein was used as an indicator to indicate the presence of base in a solution by changing the color of the solution from