With the help of titration, the average molarity of acids and bases could be determined. Through some simple calculations, the average molarity of the base NaOH was found to be 0.13 M. This was a reasonable molarity because after equilibrium is reached, the equilibrium molarity is supposed to be smaller than the initial molarity, which was 10 M. This number was used in the calculations of the molarities of the HCl solution, which averaged to 0.043 M, and the molarities of the acetic acid solution
OBJECTIVE: The purpose of this experiment is to better understand forces and torques when an object is at static equilibrium. INTRODUCTION: In order for an object to be in static equilibrium, meaning at rest (zero acceleration and velocity), the sum of all external forces acting on that object along any axis must be zero. F ⃗net= ∑▒〖F ⃗_i=0〗→∑▒〖F_ix=0;〗 ∑▒〖F_iy=0;〗 ∑▒F_iz =0; [1] In addition, because the object is not rotating, the sum of all torques in any axis must be also be zero. τ ⃗_net=∑▒〖τ
Acid-Base Titration Lab Report By Andjela Mandic 11/24/14 Period 1 Purpose: The purpose of this experiment was to find the molarity of a sodium hydroxide (NaOH) solution by titrating it with a Hydrochloric Acid (HCl) solution. Materials: Burets (50mL), Buret Stand, Buret Clamp, Graduated Cylinder (10mL), Erlenmeyer Flask (125mL), Index Card, Beakers (250mL), Safety Goggles, Aprons, 0.100M HCl (standard solution), NaOH (concentration unknown), Distilled Water, Indicator (bromothymol
Kaitlyn Camp 111-501 The Properties of Water; Osmosis and Diffusion Report In the process known as “osmosis”, a solvent will permeate from a solution of low solute concentration to a solution of high solute concentration. Due to this process, there are three terms that are used when describing solute concentrations in a solution relative to another. These terms are: isotonic, hypertonic, and hypotonic. According to the lab manual, isotonic is when “two solutions, separated by a semipermeable membrane
said that a person should drink more than 100 glasses of soda per day to be infected by cancer. The national toxicity program proved that 4-Mel on sodas is toxic and leads to infertility, dysfunction of thyroid, and liver and lung cancer. After this report by the NTP, 4-Mel was added to the list of the chemicals linked to cancer in the state of California. Prop 65 consumer protection laws helped the state of California to ban the use of carcinogen and required a cancer warning label on all the coke
Sarah Min CHEM 143A: Section A03 A10627548 April 14, 2015 Lab Report 1 - Recrystallization and Identification of Unknown Introduction The main concept in this experiment is recrystallization. Recrystallization is the process where the solute (a crystalline material) is dissolved in a hot solvent. The heated solution is filtered (generally via vacuum or gravity filtration) and is returned back to its solid crystalline state when the solution cools down. Recrystallization is best for isolating and
Introduction Cells like to have some control over what gets in and what goes back out. This is called selective permeability (Tamarkin 2011). Two ways small particles can get past the cell membrane are through diffusion and osmosis (Tamarkin 2011).The terms diffusion and osmosis refer to the way small particles move. They are both examples of passive transport (Tamarkin 2011). Diffused particles move in a concentration gradient (Tamarkin 2011), which means they both move from areas of high concentration