Lab Report: Physical And Chemical Changes

581 words - 2 pages

Purpose:To investigate the difference between physical and chemical changes in matter.Materials:Safety glasses13 small test tubesTest tube rackTest tube holder2 100-mL beakersFunnelWatch glassStirring rodEvaporating dishMagnetMagnifying glassCrucible tongsSpatulaBalanceMeeker burnerRing standIron ringWire gauzeForcepsSulfurIron filingsSodium BicarbonateSodium ChlorideSugarSandMagnesium ribbonHydrochloric AcidDistilled waterFilter paper9 disposable dishesProcedure:1. Label 7 of the dishes with the names of the following products: Sulfur, Iron, Sodium Bicarbonate, Sodium Chloride, Sugar, Sand, and Magnesium. Place small samples of each in the appropriate dishes.2. Examine each sample with a magnifying glass and magnet and record your observations in the data table.3. Put small samples of each substance in a test tube along with 3 mL of water to determine their solubility.4. Mix some of the Iron and Sulfur on a clean disposable dish and examine the mixture with a magnifying glass and magnet. Record your observations in the data table. Save and label this mixture.5. Mix some of the sand and Sodium Chloride on a clean disposable dish and examine the mixture with a magnifying glass and magnet. Then, place this mixture in a clean 100-mL beaker. Add 30 mL of tap water and stir. Prepare a filtration setup, filter, and record your observations.6. Pour 10 mL of the filtrate into an evaporating dish, prepare a heating setup, and gently heat until all of the liquid is gone. Examine the residue in the evaporating dish and on the filter paper.7. Using the crucible tongs, hold a dry piece of Magnesium ribbon in the flame. Quickly place the burning ribbon on the watch glass. Compare the appearance of the ribbon before and after burning.8. Place the burnt remnants of the Magnesium into a clean test tube, and add 10 drops of Hydrochloric acid to it. Also, add 10 drops to the...

Find Another Essay On Lab Report: Physical and Chemical Changes

AP Biology Lab Report for Population Genetics and Microbiology

2632 words - 11 pages equation p2 + 2pq + q2 to figure out the expected adults for the genotypes AA, Aa, and aa. The students also produced graphs showing allelic frequencies and genotype frequencies. They concluded that their original hypotheses were indeed correct. Therefore, there was support that the Hardy-Weinberg Theory and the 5 cases for evolution were indeed accurate in their own particular cases (170 words).IntroductionIn this report, students conduct a

Microbiology lab report on Escherichia coli and Staphylococcus aureus.

825 words - 3 pages Microbiology Lab ReportPractica #1BTC307LAmber AmelingmeierThursday, September 18, 2008OBJECTIVESIn this lab experiment two different types of bacteria, Escherichia coli and Staphylococcus aureus, were grown singly and mixed on four different types of agar in order to observe the varying morphologies within the colonies. Resulting data was analyzed to provide understanding of the use of differing culture media and conditions for bacterial

Lab Report on Serial Communication and Accessing IBM Comm. Ports

1113 words - 4 pages Lab Report on Serial Communication and Accessing IBM Comm. Ports Lab Title: Serial Communication and accessing IBM comm. ports using DOS and BIOS 1. One of the main differences between serial and parallel communication is the number of wires used to

How Boy's Emotional, Physical, and Mental Developmental Changes Affect them in School

1678 words - 7 pages labeled “difficult” or “failures” and becoming remorse with self-doubt (Gurian & Stevens 2006). The purpose of this paper is to give insight on how boy’s emotional, physical, and mental developmental changes affect them in school. Emotional Development Emotional development is defined as the development of a full range of emotions from sad to happy to angry, and learning to deal with them appropriately. Of course, boys often don’t experience

Lab report on gas chromatograph and the optical activity of carvones.

680 words - 3 pages same physical properties but have different optical rotation, they are enantiomers.All errors in this lab that could have occurred must be do to calculation or machine fault, due to the fact that no experiment was actually done. Samples were merely tested in a GC machine and calculations were made.

Observing Emulsification and Comparing the Actions of Saliva and Pepsin: Lab report describing how emulsification may be observed in the lab

2164 words - 9 pages IntroductionAim: The objectives of this lab experiment are to observe the process of emulsification and to compare the actions of pepsin and saliva (Amylase).Background Information: The function of the human digestive system is to digest food that is taken in. Digestion is the process by which large, solid substances such as fats and proteins are broken down into small soluble substances. Digestion consists of two main processes, physical

The printing business. Report discusses the history, changes, and present of the business

1946 words - 8 pages The printing industry is a very important and useful industry. The industry has gone through a lot of changes. My report will discuss the history, changes, and present of the printing business.The first printing was actually in China and was called yin (meaning to authenticate by the impression of a seal on clay). Seals were followed by taking ink rubbings from stone inscriptions, which has directly led the way to the making of books by inked

Ecology Lab Report: Discussing the 3 things that ecologists do: Mark, Recapture, Release, Survivorship Curves and Food Web.

1071 words - 4 pages Ecology is the study of organisms and their relationship with their surroundings. It is the study of the interaction between the many different members of a species with each other, with other organisms, and with the chemical and the physical environment. A first step to understanding individual animals, and in turn populations of animals, is to understand the relationship they have with their environment. A species is all the organisms of a

This is a physics lab report on finding the spring constant (k). It includes many tables and charts of data.

984 words - 4 pages .008 . If this is thought of in terms of gravity and the height of the mass and the spring, when the spring is stretched most and further down, there is more gravitational potential energy. When the spring is stretched less, and the distance of the stretched spring is less, then there is less gravitational potential energy.I enjoyed working on this lab, because it gave us a hands-on chance to work with the spring constant (k). The lab helped me more fully understand the meaning of the spring constant, how it changes, and what its value means. The lab was fairly simple to conduct, and followed along with the sheet close to the guidelines.

Enzyme Kinetics Lab Report: The reaction rate of enzyme, '-amylase in Starch-Iodine solution at different temperatures and pH levels

1996 words - 8 pages accelerate the chemical reaction changes catalytic property and ultimately it decomposed.The rate of the enzymatic reaction is when the rate at which the enzyme-substrate complex forms and it decomposes to form the product. There are two factors that formulate enzymatic reaction. The first factor is that time required by the enzyme to alter the substrate to its product, and the second factor is the rate that it takes to form the enzyme-substrate complex

the Effects of Chemical Castration and Physical Castration

1841 words - 7 pages unexpected and surprising changes in pitch. Qawwalis (Ae haqeeqat from Dulhan ek Raat Ki). Seductive songs (Malavun tak deep,) a Marathi song composed by her brother, is considered the most erotic song. High-pitched songs (Aa ab laut chalein from Jis Desh Mein Ganga Behti Hai) (Ajit, 2001). Yet another genre Semi classical, which strangely is highly, underestimated aspect. Harish Bhimani's says her “classical concerts -- which she had conducted

Similar Essays

Physical And Chemical Changes + Specific Heat

878 words - 4 pages energy required to raise 1 gram of water 1 degree Celsius (at sea level). One calorie is equal to 4.18 joules of energy. Also required for this lab is the knowledge that 1 mL of water is equal to 1 gram, and that 1 liter is equal to 1000 mL.A chemical change will result in the formation of at least one new substance. This helps distinguish between when a physical change has occurred and a chemical change has occurred. The properties of the new

Lab Report Using A Chemical Titration To Measure Rate Of Conversion Of Hydrogen Peroxide To Water And Oxygen

2711 words - 11 pages Lab Report Using a Chemical Titration to Measure Rate of Conversion of Hydrogen Peroxide to Water and Oxygen Overview: In this laboratory you will use a chemical titration to measure and then calculate the rate of conversion of hydrogen peroxide (HO) to water and oxygen using the enzyme catalase. Objectives: Before doing this exercise, you should understand: Ø the general functions and activities of enzymes Ø the relationship between

Chemical And Physical Matter And Its Properties.

774 words - 3 pages identity of the substance. Physical properties describe the substance itself. Examples of these properties are properties such as melting point and boiling point.A change in a substance that does not involve a change in the identity of the substance is called a physical change. Examples of physical changes include grinding, gutting, melting, and boiling a substance or material. These changes do not change the physical identity of a property. For

Selenium Physical And Chemical Properties And Uses.

866 words - 3 pages they are heated converting to grey selenium at 180 °C. This grey selenium has a `hexagonal crystal lattice consisting of helical polymeric chains and is the most stable and dense form of selenium' (Calinpop 2012) Two of the main physical features of selenium (in particular grey selenium) is that it's a semiconductor, which allows it to conduct electricity and also a photoconductor ,changing light energy into electrical energy