3. Calculate the mass of baking soda,NaHCO3 , and find the percentage of baking soda in the unknown mixture. ※ Data and observations (a) Table 1: Percent yield of Na2CO3 from baking soda Percent yield of Na2CO3 from baking soda Trial 1 Trial 2 Mass of flask + NaHCO3 95.12 g 93.45g Mass of flask 94.15g 92.03g Mass of NaHCO3 0.97g 1.42g Mass of flask + Na2CO3 95.01g 93.12g Mass of Na2CO3 (actual yield) 0.86g 1.09g Mass of Na2CO3 (theoretial yield) 0.61g 0.90g % yield of Na2CO3 140% 120% (b) Table 2: Percent of baking soda in Unknown Percentage of NaHCO3 in an unknown mixture # C Trial 1 Trial 2 Mass of flask + unknown mixture #C (before heating) 95.81g 94.85g Mass of flask 94.15g 92.03g Mass of unknown mixture (before heating) 1.66g 2.82 g Mass of flask + residue (after heating) 95.20g 93.80g Mas of H2CO3 (H2O + CO2) (after heating) 0.61g 1.05g Mass of NaHCO3 in the unknown mixture 1.65g 2.84g % of NaHCO3 in the unknown mixture 99.0% 101% ※ Calculations For table 1: Theoretical yield of Na2CO3 for trial 1
Baking powder – baking soda What’s the difference between baking soda and baking powder? Interesting question, Sister Beth. Baking soda and baking powder are both chemical leavening agents that cause batters to rise when baked. In fact, baking powder is a combination of baking soda plus a few other things that I’ll tell you more about later, but first let’s focus on baking soda. Baking soda is another name for sodium bicarbonate (NaHCO3 for you chemistry buffs out there).
Problem Which dissolves in water better, salt or baking soda? Hypothesis If salt and baking soda where put in water then baking soda will dissolve better than salt. Abstract The purpose of this project is to determine which material dissolves better in water between salt and baking soda. The hypothesis is If salt and baking soda where put in water then baking soda will dissolve better than salt. One teaspoon of salt and one teaspoon of baking soda were put in two separate transparent glasses of water and then the time of dissolving of each substance were calculated.
In 1846, two New York bakers, John Dwight and Austin Church, established the first factory to develop baking soda from sodium carbonate and carbon dioxide. This compound, referred to as saleratus, is mentioned in the famous novel Captains Courageous by Rudyard Kipling as being used extensively in the 1800s in commercial fishing to prevent freshly-caught fish from spoiling. Naturally occurring deposits of nahcolite (NaHCO3) are found in the Eocene-age (55.8–33.9 Ma) Green River Formation,Piceance Basin in Colorado. Nahcolite was deposited as beds during periods of high evaporation in the basin. It is commercially mined using in-situ leach techniques involving dissolution of the
Kyla Emerine Date of Experiment: April 15, 2015 Report Submitted: August 17, 2015 Title: Colligative Properties and Osmotic Pressure Purpose: To observing changes of colligative properties in freezing and boring points, by adding salt to a solution. Procedure: In this experiment I performed various procedures such as adding different amounts of salt to tap water that was freezing or boiling and observed how it changed the temperatures. Data Tables: Data Table 1. Dialysis Tubing Results Time: |Mass of Dialysis Tubing and Contents | 0 minutes |6.5g| 30 minutes |6.8| 60 minutes |7.2| Questions A. In your experiment, is the light corn syrup in the dialysis tubing hypertonic or hypotonic to the water?
Samantha Monette Lab Section E Wednesday 10:00-12:50 p.m. Bromination/Debromination of Cholesterol Abstract: The purpose of this experiment was to purify commercial cholesterol. The commercial cholesterol was brominated using bromine as the reagent. After the compound was cooled and vacuum filtrated, dibromocholesterol was obtained. To purify the dibromocholesterol, zinc was added as the reagent. After a series of washes to remove any impurities, the compound was dried and decanted, cholesterol was synthesized.
Grind an aspirin tablet into a fine powder by using a mortar and pestle. Weigh accurately an aspirin powder. Determine the mass and record it on a data table. 2. Put aspirin powder in a beaker and pipette exactly 30 cm3 of a 1 M NaOH solution onto the powder.
Rates of Reaction - Marble Chips and HCl In this experiment, marble chips, or Calcium Carbonate (CaCO3), will be dropped into a flask containing Hydrochloric Acid (HCl). The reaction is: CaCO3(s) + 2HCl(l) --> CaCl2 + H2O(l) + CO2(g) The experiment will determine whether or not stirring quickens the reaction rate, which will be illustrated by the slope of the lines in the data graph. If heat and stirring is added to a reaction, then the gas will be released quicker. This is so because when two compounds interact, or collide, a reaction occurs. If the compounds are made to collide faster, by way of stirring, then theoretically the reaction as a whole will start faster and come to completion faster.
Quality Control for the Athenium Baking Soda Company A Self-Directed Experiment 16 April 2012 INTRODUCTION The Athenium Baking Soda Company has begun producing baking soda (sodium bicarbonate, or sodium hydrogen carbonate). NH4HCO3 + NaCl ==> NaHCO3 + NH4Cl Due to the high concentration of the brine solution that is used to generate the product, contaminants are often present in the finished product as chloride compounds. The contaminants may be detected when the finished baking soda product is dried and filtered. PURPOSE: In this experiment, we will be employing quality control by analyzing the composition and purity of the contaminated baking soda samples. To perform this experiment, we will utilize emission spectra, titrations, and thermal gravimetric analysis, using knowledge from Experiments 10, 4, Titrations of Na2CO3 and NAHCO3 by HCl (hydrochloric acid) will be performed to determine the concentration of HCl, as well as the number of moles of HCl present within the sample of baking soda.