Chemical Formula Lab Report

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 and those that are carbon based are referred to as organic molecules. Organic molecules occur in four different types in living cells; carbohydrates, lipids, proteins and nucleic acids. They are also known as hydrocarbons due to the presence of both hydrogen and carbon. Carbohydrates are made up of carbon, hydrogen and oxygen in the ratio 1:2:1. They are important sources of energy and are classified in three main groups; monosaccharides, disaccharides and polysaccharides.

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

Solutions of 6M H2SO4, 6M NH3, 6M HCl, 6M NaOH, and 1.0 M of NaCl, 1M Fe(NO3)3, 1M NiSO4, 1M AgNO3, 1M KSCN, 1M Ba(NO3)2, and 1M Cu(NO3)2 were given in separate test tubes. The color of possible precipitates, ions, acid-base behaviour, odor and solubility rules were conducted and were reported in Table 1. The key information about a mixture of two solutions was

Table 2: Consists of color extract taken from a red cabbage for a natural indicator. The pH reading that was measured by using the pH meter and the result of the pH reading to determine whether the solution was acidic or basic.

Being able to identify an unknown compound is incredibly important as it would allow chemists to synthesize compounds in various reactions and identify the products. Although balancing an equation is always possible, full and complete reactions based on a chemical equation are not possible in practice, and as such, being able to identify what was actually created would be important. Additionally, it would be important to

From the calculations in the data analysis, the actual percent composition of magnesium is 65.3% ± 1.7%, the actual percent composition of oxygen is 34.7% ±2.5%. The purpose of this lab was achieved as the percent composition of the magnesium oxide was determined and was used to test the law of definite proportions. The hypothesis was mostly correct as the results demonstrated that the actual percent composition was only slightly greater/lesser than the hypothesized percent composition. However, the actual percent composition may have been affected by several limitations during this investigation.

The purpose of doing this experiment is to be able to determine the formula of a copper sulfate hydrate heating it up

Therefore, a chemical change is taking place because copper is turning into a new metal. Based off of the experiment, it is easy to conclude that vinegar with the combination of air, causes a chemical change on

To begin with, I used blue litmus paper to determine the acidity of a cup of coffee, an apple and a tomato. When the litmus paper was dipped into the cup of coffee the paper turned a light red almost purple, which by using the pH scale I would say the pH is 5.5. Then, I took my litmus paper and rubbed an apple with it. The paper turned a darker red, but I can only guess using the pH scale the pH is between 2.5 and 4. Finishing up on the foods, I tested a glass of tomato juice, the color of the litmus paper turned a shade of red between the dark red of the apple and the light red of the coffee. Using the pH scale I would say the pH of the tomato juice is a little over 4.

To understand this lab there is knowledge prior to the lab that was taught. A physical change is a change affecting the form of a chemical substance but not its chemical composition. Physical changes can be used to separate mixtures into their component compounds. An example of a physical change is a popsicle freezing in the freezer. A chemical change is any change that results in a new formation of chemical substances. An example of a chemical change is when rust forms on nail. The signs to look for to see if there is a chemical change are color change, odor change, production of bubbles and gas, production of heat and light, and production of a precipitate. If any of these signs happen in the lab it is a chemical change. The question for

Synthesis Reactions were carried out using the interfacial polycondensation technique. An aqueous solution (10.0 ml) containing PDA, (0.00200 mol) and sodium hydroxide ( 0.0040 mol) was transferred to a one quart Kimax emulsifying jar fitted on top of a Waring Blender (model 1120; no load speed of about 18,000 rpm; reactions were carried out at about 25 oC). Stirring was begun and a chloroform (for the triphenylantimony and arsenic solutions and carbon tetrachloride for the triphenylbismuth solution) solution (10.0 ml) containing the Lewis acid dihalide (0.00200 mol) was rapidly added through a hole in the jar lid using a powder funnel. The resulting solution was blended for 5 seconds.

The purpose of the lab “Chemical or Physical Change” is to analyze changes of matter and determine whether a physical or chemical change took place based on the observations and evidence acquired from the six experiments. Based on previous knowledge, a physical change is a change in a substance appearance that does not involve a change in the identity of the substance. This type of change in matter only changes the physical properties of the substance which are the properties that can be observed and measured without changing the materials composition. Examples include ripping, cutting, cracking, splitting, and changes in states of matter such as melting or freezing. This type of change in matter can usually be undone. A chemical

The following procedure must be repeated twice as there has to be two trials. At the end the average of the formulas will be determined. Before beginning the experiment it is important to dawn safety gear including gloves, apron and goggles. We will first obtain the mass of an empty weigh boat and record the mass in the data table. When using the analytical balance it is important to zero the scale by closing the doors of the balance and pressing the zero button. Place 3-4 pieces of magnesium metal on the weigh boat and record the mass in the data table. Grab the 2 test tubes and label them according to the trial. Then place the 2 test tubes into the 400-ml beaker. Using the 10-ml graduated cylinder measure out 8.0-ml of 6M HCl and then pour

A chemical formula is a way to show chemical symbols and numbers to represent a substance.

The chemical tests that will be performed would be fucose test to determine the fucose content, uronic acid test to determine the presence of uronic acid, sulfate ion tests to determine the presence of sulfate, carbohydrate tests to determine presence of carbohydrates and reducing sugars and, protein test to determine the contaminations present in the fucoidan.