Lab Report For Chemistry Lab

6-3: This process is used by cells to manufacture _biochemical energy from nutrients into adenosine triphosphate (ATP), and then release waste products__

Purpose: To become familiar with the International System of Units and common laboratory equipment and techniques. To learn how to determine volume, mass, length, and temperature of a wide variety of items. To learn how to calculate density and concentration of dilutions.

When faced with a problem a good scientist will use experiments, notes, debates, and more to their advantage to solve the tough questions. A groups of scientists did just that when faced with a problem of their own. A tiny vial with a white powdery substance in it was put in front of them, and they needed to find out what was in it! Faced with nine possible ingredients in the “Mystery mixture,” a well tray, a water dropper, and a toothpick, these scientists were a little overwhelmed, but determined. One of the first things they did was look at the substance and compare it to their own mixtures, using experiments or chemical properties. Chemical properties are a chemical’s reaction to another or more substances, and a change in it’s identity. When they observed the chemicals the students were using physical properties, or observing the chemical’s smell, texture, color, appearance, size, and shape. They believe Baking Soda and Citric acid are in the Mystery Mixture.

The mole is a convenient unit for analyzing chemical reactions. Avogadro’s number is equal to the mole. The mass of a mole of any compound or element is the mass in grams that corresponds to the molecular formula, also known as the atomic mass. In this experiment, you will observe the reaction of iron nails with a solution of copper (II) chloride and determine the number of moles involved in the reaction. You will determine the number of moles of copper produced in the reaction of iron and copper (II) chloride, determine the number of moles of iron used up in the reaction of iron and copper (II) chloride, determine the ratio of moles of iron to moles of copper, and determine the number of atoms and formula units involved in

The purpose of this lab is to test substances and to determine the physical and chemical properties of substances.

The proof (twice the % alcohol) starts at its maximum and goes down (as the alcohol evaporates). If we start with a high concentration of alcohol, we will get the azeotrope (95% alcohol, 5% water) for a while, then the concentration will decrease.

Chemical changes are often accompanied by physical changes. Three that you should not see in this lab are changes in temperature, presence of a flame, and evolution of light, as when as firefly glows. Three physical changes that indicate a chemical change may have occurred (and that may be seen in this lab) are:

Lab 1 also teaches us the importance of molecular weight of a substance and how to use that to find the amount of moles of that substance in a solution. For example; in exercise 3 we were asked to weigh 8 grams of sugar and then calculate how many moles of sugar it really was. Using the molecular weight of sugar (C = 12.01 grams/mol, H = 1.008 grams/mole, O = 15.00 grams/mole). We were then able to use this molecular mass of the sugar that we then had to use to calculate and determine the molarity of the sugar

A few more important terms to keep in mind when doing a lab with chemical and physical changes are

Dispense .5 mL water into the already weighed conical vial, replace cap and face insert on its down side.

Matter is anything that has mass and takes up space. During the late eighteenth century, scientists began to use qualitative tools to study and monitor chemical changes. By carefully measuring mass before and after many chemical reactions, it was observed that, although chemical changes occurred, the total mass involved in the reaction remained constant. Assuming this was true for all reactions, chemists transformed this observation into a scientific law; the law of conservation of matter, which states that mass is neither created nor destroyed during a chemical reaction, it is conserved. In other words, the mass of the reactants equals the mass of the products.

This section of the experiment was composed of a series of different chemical reactions. In the first reaction, a small piece of zinc is placed is in a test tube that contains 2 mL of 6 M HCl; observations were then recorded. The next reaction, which should take place under a hood, requires a 1-inch copper wire to be placed in a clean test. Concentrated nitric acid is then added and observations are recorded. In the third reaction, 1 mL of 0.1 M sodium oxalate, Na2C2O4, is placed in a clean test tube.

The purpose of Enzyme Lab is to test how enzyme react with substrate at different environment. Protein is made of one or more lone chain of amino acid that help to perform many different function inside the body, and many of the enzymes are protein. Enzyme is substance act like a catalysts, it bind with substrate lower the activation energy to increase the rate of chemical reaction of the cell. Substrate act as a key to enzyme, they will find a enzyme that could bind with them and cause reaction. Active site is where enzyme and substrate bind in together. Activation energy is energy create by combining enzyme and substrate to undergo an specific chemical reaction. Protein is made of one or more lone chain of amino acid. Rate of reaction is

Understanding boiling point, density, mass, and volume and being able to classify them as either intensive or extensive properties will enhance our knowledge of these properties and ultimately innovate our daily lives. For instance, unknown material can be identified by knowing the boiling point, density, mass, and volume of the substance. Intensive properties aid the process of identifying unknown substances for the reason that they don’t depend on the quantity of the substance nor do they alter. Although, extensive properties do alter due to quantity that is present, they differentiate between matters. Therefore, both of the experiments will aid in the knowledge and

In The Laboratory, the courtesan chooses poison as her murder weapon. Poison is often the weapon of choice for female killers. It requires little or no physical strength to administer, and can be done secretly. It also leaves little evidence thus making it difficult to detect the culprit. We believe the act of murder is because of another woman that her lover is with and she feels physically inferior to her rival. We know this because she starts saying ‘What a drop! She’s not little, no minion like me.’ The murderer is also fascinated and excited about the poison and power of the poison, she says ‘And yonder soft phial, the exquisite blue sure to taste sweetly’ She thinks that her rival who she is out to kill will think nothing of it and