LAB 1 POSTLAB REPORT (65 pts) 1. State the objective(s) of the lab. (5 pts) • To analyze the effects of specific liquids on a variety of materials • To observe potential hazards • To investigate the effects of strong bases‚ strong acids‚ acetone and bleach on a variety of materials which include sugar‚ cotton‚ nylon‚ hair‚ polystyrene‚ egg white‚ egg yolk‚ and aluminum foil. 2. Give a summary of your observations for each of the experiments. (24 pts) Sugar + H2SO4 Black clumped substance
Premium Sulfuric acid Egg yolk
COMPARATIVE INVESTIGATION OF ORGANIC COMPOUNDS Abstract Organic compunds were examined to a comparative investigation to differentiate the properties of each sample. The physical state at room temperature‚ odor and color of the sample were noted by simple observation. In terms of solubility in H2O‚ 5% NaOH solution and 5% HCl solution‚ the samples were classified as to miscible‚ slightly immiscible or immiscible for liquid; and very soluble‚ soluble‚ partially soluble or insolubse for solid. The
Premium Benzene Hydrocarbon Carbon
Planning Exercise Aim To investigate the effect of phosphate on cell division in root tips. Background knowledge Phosphate ions (macronutrients) are needed large amounts by plants. They are required for root growth. For the root tips cells to divide‚ mitosis has to occur. Phosphate is needed for production of ATP which provides energy for mitosis to occur. DNA replication occurs during interphase of the cell cycle. DNA is made up of nitrogen containing base‚ pentose sugar and phosphate group
Premium DNA Cell cycle Mitosis
SBI4U Exam Review Topic 1 1. The table below shows the level of hemoglobin measured in two different groups of athletes. Hemoglobin / grams per 100 cm3 Number of athletes tested Standard deviation / grams per 100 cm3 Group A 12.6 200 0.8 Group B 11.9 220 3.2 Which of the following statements is correct? A. Results from group B are more accurate because more athletes were tested. B. Results from group B are more reliable because it has a higher standard deviation. C.
Premium DNA
is the movement of water molecules from high concentration to low concentration through semipermeable membranes‚ caused by the difference in concentrations on the two sides of a membrane (Rbowen‚ L.). It occurs in both animals and plants cells. In human bodies‚ the process of osmosis is primarily found in the kidneys‚ in the glomerulus. In plants‚ osmosis is carried out everywhere within the cells of the plant (World Book‚ 1997). This can be shown by an experiment with potato and glucose/salt solution
Premium Concentration Osmosis Solution
Sustainability and Organic Foods People nowadays are getting into the “go green” lifestyle while others continue to live without thinking about the effects they have on the environment. Why do people go green? It can save you money‚ it is the right thing to do‚ it is healthier because there are less toxins and less illness‚ it is helping future generations‚ and it is a chance to connect with the local community and spread the word. To go along with this lifestyle and its benefits‚ catering companies
Premium Sustainability Local food Natural environment
”The share of organic and natural cosmetics in the $270 billion global cosmetic market is growing at a fast pace.” As people are becoming more and more conscious of the negative side effects of extended use and exposure to chemical cosmetics so too has the cosmetics industry. Cosmetics normally use aromatic hydrocarbons that are derived from petroleum which have been proven to show long term side effects on the skin. While the idea of organic cosmetics is not new a company as well known as M.A.C
Premium Marketing
in each of these forces‚ structural stigma "represents the policies of private and governmental institutions that restrict the opportunities of stigmatized groups groups. "Minority stress" is the term used by researchers to refer to the negative effects associated with the adverse social conditions experienced by those belonging to a stigmatized social group. As a product of sociopolitical." By legitimating and reinforcing the undesired differences of sexual minorities and by according them inferior
Premium Homosexuality Sexual orientation Marriage
Stopping Organic Spoilage Grocery owners‚ how much spoilage did you report last year? Anywhere from 15 to 35% of your sales come from produce and fresh vegetables. By my calculations somewhere around 10% or more is thrown out and reported as a loss each year. That is millions of dollars in profits lost from spoilage that can be prevented. Organic spoilage‚ and lack of rotation in stock and merchandise is totally preventable with the introduction of my new system. It is a simple combination of
Premium Vegetable Tomato
Course Number: Course Name: GE304 FUNDAMENTALS OF MATERIALS SCIENCE AND ENGINEERING Course Description: Structure and composition of materials (metals‚ polymers‚ ceramics and composites). Processing‚ properties and behavior in service environments. No. of Units for Lecture and Laboratory: 3 units lecture No. of Contact Hours per week 3 hours lecture Prerequisites General Chemistry‚ Physics 2 Course Objectives At the end of the course the student must be able to: 1. Identify the importance of
Premium Materials science Engineering Chemistry