Practice 2: ORGANIC COMPOSITIONS OF THE CELL 1.CARBOHYDRATES 1.2.3. Task2-Chemical Detection of Starch Duration (mins) | Color of spot | Explanation | 0 | | _ For amylose (the polysaccharides that is present most in the rice suspension), the core of the helix structure easily accommodate iodine which is in Lugol solution). This complex has the deep blue color._ However, the helix structure (to be more specificly, the glycosidic bonds) is easily wrecked by heat (boiling temperature of water)
Words: 1223 - Pages: 5
experiment was to determine the percent calcium carbonate in a heterogeneous mixture and to determine the molar volume of carbon dioxide gas at 273 K and 760 torr. This is done by constructing a gas generator to collect the CO2 gas evolved from the reaction. The masses of the sample in the gas generator before and after the reaction are measured. The volume of CO2 gas is also collected and measured. As a result, we found that 25L of CO2 was collected, and after further calculations the molar volume turned
Words: 577 - Pages: 3
Key Terms In a lab experiment there has to be a detailed written page. On the written page you should include purpose, hypothesis, materials, procedure, observations, conclusion, application, and finally a diagram. Purpose is used to describe why the experiment has to be done. Hypothesis is used before the experiment has started; it is an educated guess or can be said as a prediction. Materials are one of the 4 most important pieces in a lab. Without the materials you don’t know what tools
Words: 769 - Pages: 4
SST | Aquatic environments | Terrestrial environments | Vercosity: A measure of how difficult it is to move through a substance. | Aquatic animals are usually have a streamline shape to assist them with moving more easily through water. | An advantage over aquatic as it is easier for animals to move through air than water. | Buoyancy: A measure of a substances ability to support or hold an object. | Water is more buoyant than air. i.e a cork in air compared to a cork in water.An advantage over
Words: 810 - Pages: 4
from lab Purpose: Replace this blue text with the purpose from the lab Procedure: Have you made any changes to the procedure? Please explain. If you made no changes, state so. (1 point) Please Note: This lab involves a lot of waiting for the gas collection. Make sure you allot yourself the full three hours to perform the experiments. Observations: Use this table to record all your observations for each section of the experiment. Please use complete sentences. Section in procedure 1: Hydrogen
Words: 464 - Pages: 2
Mlungisi Maphunta 147565 Bachelor of Science II C202 Practical Report Group 15 Experiment8 COLLIGATIVE PROPERTIES: FREEZING POINTDEPRESSION AND MOLAR MASS Group Members Mncedisi Mngomezulu Sphiwe ndwandwe Thandeka Mpila EXPERIMENT 8: COLLIGATIVE PROPERTIES: FREEZING POINT DEPRESSION AND MOLAR MASS: AIM The aim of the experiment is to become familiar with the colligative properties and to use them to determine the molar mass of a substance. THEORY A solution consists primarily of solvent and
Words: 1635 - Pages: 7
important in atmospheric processes * Oxygen (O2) - 21% Variable Gases * Water Vapor (H2O) * Carbon Dioxide (CO2) * Ozone (O3) Water Vapor * An invisible gas * If you can see it it's not water vapor!!! * Gaseous phase of water * Three States of Matter * Solid (ice), liquid, and gas (water vapor)
Words: 301 - Pages: 2
the bottle is the same before the experiment began. Therefore the only force that would cause the egg to enter the bottle is gravity and the diameter is too small for just that force to work. 2. According to Gay-Lussac's law, the pressure of a gas of fixed mass and fixed volume is directly proportional to the gas's temperature. When we changed the temperature of the air inside the bottle, we changed the pressure of the air inside the bottle because the volume of air is constant therefore the
Words: 499 - Pages: 2
wet, it crackled before lighting. This phenomenon occurs because the oxygen in the air trapped inside the graduated cylinder was used by the fire so the water rose around it. The properties of matter that were demonstrated was solid, liquids, and gas thanks to changing temperature. The concepts that the demo shows is that when the oxygen is depleted from the air, the water becomes less dense and rises around the
Words: 338 - Pages: 2
Assignment # 2 Petroleum Engineering Thermodynamic 1. PCB/PDB 1043 A piston–cylinder device initially contains 0.07 m3 of nitrogen gas at 130 kPa and 120°C. The nitrogen is now expanded to a pressure of 100 kPa polytropically with a polytropic exponent whose value is equal to the specific heat ratio (called isentropic expansion). Determine the final temperature and the boundary work done during this process. 2. A frictionless piston–cylinder device contains 2 kg of nitrogen at 100 kPa and
Words: 866 - Pages: 4
