Chemical Bonds Lab Report

Introduction Living cells are involved in a series of chemical reactions rapidly due to the participation of

II. INTRODUCTION: There are thousands of chemical reactions that occur in a cell at every moment. These chemical reactions do not occur randomly, they are highly under the control of biological catalysts called enzymes. Most of these enzymes are proteins. These proteins have certain primary structures directed by

In chemical reactions bonds must be broken and new bonds must be formed. In order for this to occur the bonds must be made less stable. For bonds to become less stable a small input of energy is required and this is

Komal Patel Chemistry Honors Period: 5 February 29, 2016 Chemical Reaction Lab Report Introduction A chemical reaction is when substances (reactants) change into other substances (products). The five general types of chemical reactions are synthesis (also known as direct combination), decomposition, single replacement (also known as single displacement), double replacement (also known as double displacement), and combustion. In this lab, the five general types of chemical reactions were conducted and observations were taken before, during, and after the reaction. Then the reactants and observations were used to determine the products to form a balanced chemical equation. The purpose of this lab was to learn and answer the question: How can observations be used to determine the identity of substances produced in a chemical reaction?

Clean station when not in use. Wash hands with soap and water before leaving. Materials/Equipment- Spot (reaction) plate Graduated Cylinder (50 ML) Beaker (150 ML) Beaker (500 ML) Hot Plate Bunsen burner Ring stand w/ metal ring Crucibles with lid Crucible tongs Test tube tongs Spatula Thermometer Electronic or triple beam balance Test tubes Apron and Goggles Procedure- The procedure for this lab includes many simple steps and a few different things we are testing. Our first Procedure was to combine water and salt to see what kind of reaction it would make. First we fill the graduated cylinder with 100 ml of water. We then measured 1.0 grams of table salt on a balance to get an accurate amount. After, we took the measured amount of salt and poured it into the water filled beaker. Lastly, we watched and recorded the reaction.

Energy keeps all living organisms alive, as they need a continual supply of energy to function in order to survive. Some of these processes are continuous such as, metabolism, which is the chemical reactions which occur in the body, these occur by using or releasing energy from chemical substances. Another continuous process which use energy is the transporting of molecules in order for them to break down, and to build new ones. The breakdown of large molecules into their simpler forms to release energy is known as catabolism, for example, when glucose is used in a cell to release energy. And the opposite reaction, is called anabolism. This is when energy is used to build complex structures from simple cells, for example, tissue growth and

A physical change is one that affects only the physical properties of a substance, while a chemical change alters a substance at the molecular level. Physical Properties: A property that can be observed or measured without changing the chemical identity of the substance. Physical properties can be categorized as either intensive or

equations. They give the ratios of reactants and products in a balanced chemical equation. …2…..Na + …….Cl2  …2……NaCl 37. Chemical formulas are written so that the charges of cations and anions neutralize (cancel) one another.

During this investigation the question we looked to answer was: what are the identities of the unknown compounds? In an effort to answer the question, our group designed a method in which the relationships between the unknown compounds in plastic bags were compared so that their identities could be determined. The mole (mol) provides a measure of the number of atoms present in the sample of a compound. One mole of an element or compound contains

Introduction: Chemical reactions make new things by rearranging other things. In a chemical reaction, the main change that occurs relates to the way atoms are bonded to each other, in order to change those connections, bonds must be broken and new bonds be formed.

2. (5 pts) List and explain the names and affiliations of the various characters/stakeholders in this story – I’m looking for us to use the story to map out the complexities that are generally associated with solving public health puzzles – the stakeholders you list and explain here should apply to many of the cases we consider going forward.

There are three types of bonds ionic,polar, and nonpolar.Ionic bonds is between metals and nonmetals where the electrons are transferred.Polar bonds are between two nonmetals and they do not share electrons equally.Nonpolar two nonmetals share electrons equally. For example of NaCl is a ionic covalent.Na is 0.9 and Cl is 3.0. Subtract 3.0 and 0.9 and the difference is 2.1 for it to Ionic it has to be greater than 1.9.Also ionic is a nonmetal and a metal.CO2 is an example of 0% of ionic. C and O are both nonmetals. Oxygen is 3.5 and Phosphorus is 2.1. This is polar because 3.5- 2.1 is 1.4 . This is an example of intermediate degree. Another way to determine if a compound is polar, ionic or nonpolar is to test the melting point ,solubility in water, and conductivity.The purpose of this lab Bonding

At station A when zinc and hydrochloric acid react with each other it is a chemical change because it creates gas bubbles and temperature change. At station B where NaOH solution and phenolphthalein react with each other it is a chemical change because it changed to the colour purple and the change looked difficult to reverse. Station C in which sulfuric acid and magnesium were to react with each other is a chemical change because it formed gas bubbles and changed colour. Station D where hydrochloric acid and Bromothymol blue were the materials is a chemical change because it changed to the colour yellow and looked difficult to reverse. In Station E where NaCl solution and AgNO3 solution were the materials is a chemical change because the reaction

Abstract Atoms are the basic units of matter and all life is based on them. Life on earth is based on the element carbon. It is a highly versatile atom able to form four covalent bonds with itself or other atoms such as hydrogen and water. Atoms combine to form molecules

Lee, Angie CHEM 221B, Section 05 F 9:00 am- 11:50 am September 30, 2015 Organic Chemistry Laboratory Procedure- Week 2 Experiment 1: Introduction to Microscale Laboratory Laboratory Exercise 1, Option A: Automatic Pipette 1. Weigh 3-mL conical vial (with cap and insert already on it) on a balance. a. Weigh to nearest milligram 2. Dispense .5 mL water into the already weighed conical vial, replace cap and face insert on its down side.