Osmosis/Egg Lab By: Nicole Dressen Problem to Solve: How the mass of an egg changes in different substances. Information Collected: A. Hypotonic: a substance with lower concentration when compared to another substance. B. Isotonic: when the concentration of two substances is the same. C. Hypertonic: a substance with more concentration when compared to another substance. Hypothesis: I think the mass of the egg that is in the water will stay the same but the mass of the egg that is in the sugar will increase mass.
How Salty Does water have to be for the egg to float? Materials and Equipment * Bag of clear 16-oz. plastic cups * Table salt * Water * Measuring cup, liquid * Container, 1-quart (qt.) * Spoon for stirring * Eggs (5) Procedures 1. Take one egg out of the refrigerator and allow it to warm to room temperature.
| Investigating Osmosis Through Living Membranes | Introduction: Diffusion is the tendency of molecules or ions to move from an area where they are in higher concentration to an area where they are in lower concentration, that is, down or along their concentration gradient (Marieb 2013). Osmosis is a special case of diffusion defined as the diffusion of a solvent, such as water, through a selectively permeable membrane (Marieb 2013). Osmosis occurs whenever the water concentration differs on the two sides of a membrane. Take a U-shaped container filled with a solution and separate the container into left and right compartments by a permeable membrane. Normally, net diffusion of both solute and water occurs until the concentration of water (and solute) is the same on both sides of the membrane (equilibrium).
A) is neutralized by water B) is surrounded by water molecules C) reacts and forms a covalent bond to water D) aggregates with other molecules or ions to form a micelle in water Answer: B Page Ref: Section 3 11 9) Which would you expect to be most soluble in water? A) I B) II C) III D) IV Answer: A Page Ref: Section 3 10) Solutes diffuse more slowly in cytoplasm than in water because of A) the higher viscosity of water. B) the higher heat of vaporization of water. C) the presence of many crowded molecules in the cytoplasm. D) the absence of charged molecules inside cells.
Haocheng Zhen Aron Jouvenet John Cureg Date: 5/20/2014 Egg Drop Competition Lab Abstract: The Goal for the lab is to design and build a contraption that can protect 1 large Grade AA raw egg from breaking when it is dropped from the second floor balcony of the Pg Bldg at Citrus College. At the Day 1 we design the first contraption, and find the physics behind contraption. At the day 2, we test the prototype, and if the egg broke, we should adjust it. After the adjustment, we measure the mass, height of drop, and time in flight of the contraption. We did the calculation after we finished the measurement and adjustment.
Understanding Food Labels Helene Torres SCI 241 August 22, 2012 Dr. Carson Understanding Food Labels The 5/20 rule is a guide for one’s daily intake. Depending on what is being eaten the percentage can work both ways. For instance, the first part, which is the 5%, can be used for the good and bad daily value. A can of Healthy Choice chicken noodle soup has 2% of calcium and 4% of iron; therefore, considering it is less than 5%, is would not be a good source of those nutrients since these are nutrients that are much needed. When using the 20% rule it works the same way.
Conditions that must remain constant in this experiment include the temperature of the water baths and the volume of peas and beads in the respirometers. The general gas law states that if temperature and volume remain constant, then the pressure of the gas will change in proportion to the number of molecules of gas present. 2. Water moves into the respirometer pipettes because as oxygen is consumed by the peas, the pressure within the pipettes will decrease and thus the negative pressure will draw the water into the pipette. It is important to correct the readings from the peas because the glass beads are used as a control in which no changes should occur in CO2 and oxygen levels due to their abiotic nature.
Liz Somone Chem 112 TA: Meng Floating Egg Lab Report The goal of this experiment was to determine the density of a solution needed to float an egg, the freshness of an egg, and the way volumetric glassware affects the value and accuracy of density. The types of volumetric glassware used were a 25-mL buret, 25-mL Mohr pipet, 25-mL volumetric pipet, 25-mL volumetric flask and a 25-mL Erlenmeyer flask. I prepared a 1500 mL solution of salt and water in order for the egg to float. Using that same solution I filled a buret that was mounted vertically to the 0 and then drained the solution to nearest 0.00 mL. The solution was then drained into an Erlenmeyer flask and I recorded the weight of the flask before (W1) and after the solution (W2) and then subtract the weight of the flask with the solution from the weight of the flask alone in order to find the absolute mass of the solution (W3).
“Fibers that cannot be digested by bacteria in the large intestines are called insoluble fibers because they do not dissolve in water.” (Grosvenor & Smolin, 2006) High fiber diets can produce many benefits, including higher nutrient absorption levels, and better waste output. Diets that tend to lack in fiber or are high in insoluble fiber tend to cause gastrointestinal irritation and constipation. People that experience these symptoms should consider reviewing their fiber sources, and water consumption
Introduction: You are aware that sugar dissolves in water but oil does not. What factors determine whether one substance will dissolve in another? A solvent is a substance that is capable of dissolving other substances and forming a homogeneous mixture called a solution. The substance dissolved is called the solute and is the component present in the smallest amount. The dissolving process involves a consideration of the relative strength of three intermolecular attractive forces.