Qualitative Reaction Lab Report

When the pH is not at its optimum, the differing pH's will disrupt the bonding between the R groups of the amino acid causing its structure and the shape of the activation site to change

- Results: When a lighted match was held 2cm away from the unlighted candle in its smoke, the flame would jump from the match to the wick having been carried by the smoke.

1. What type of macroscopic evidence for chemical change did you observe during this experiment? Give at least three different examples. (15 points) The main evidence of chemical change in this lab is the change in color, production of gas, and the production of precipitate.

When calcium chloride, sodium bicarbonate, and phenol red are put into a bag and mixed up the type of reaction that occurs is a chemical reaction for the following reasons. Things that indicate that a chemical reaction has occurred are color change, formation of precipitate, formation of gas, and energy transfer in which three of them took place in the reaction of calcium chloride, sodium bicarbonate, and phenol red. The three indicators in this experiment were: a color change, formation of gas, and an energy transfer

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

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?

Purpose: The purpose of this experiment is to observe a variety of chemical reactions and to identify patterns in the conversion of reactants into products.

Add a magnet to the bottom of the paper and observe what happens. In experiment 2 fill a small beaker until it is half-empty with cold water. Obtain the test tube in the warm water and pour it into the cold water. In experiment 3 place a piece of magnesium in a test tube and add 10 drops of hydrochloric acid. Feel the bottom of the tube. In experiment 4 scoop a small amount of sodium bicarbonate to a test tube. Add 10 drops of 6M HCI. Feel the bottom of the tube. In experiment 5 combine 5 drops of barium chloride and 5 drops of sodium sulfate. In experiment 6 mix some sodium chloride in a test tube with 2 mL of

Qualitative Observation of a Chemical Reaction Introduction Procedure: 1. Record the appearance, odor and feel of the unlit candle. 2. Heat the bottom of the candle and secure it to the glass square. 3.

Purpose: The purpose of this experiment was to observe the many physical and chemical properties of copper as it undergoes a series of chemical reactions. Throughout this process, one would also need to acknowledge that even though the law of conservation of matter/mass suggests that one should expect to recover the same amount of copper as one started with, inevitable sources of error alter the results and produce different outcomes. The possible sources of error that led to a gain or loss in copper are demonstrated in the calculation of percent yield (percent yield= (actual yield/theoretical yield) x 100.

The purpose of this lab is to determine the makeup of a compound through a series of tests. To do this, we will use qualitative analysis. Qualitative analysis is defined as the analysis of a substance in order to determine the nature of its chemical makeup (dictionary.com 1). The substance is a mixture of two different compounds. The substance will have a chlorine salt, either copper chloride or strontium chloride. It will also have one powder mixed in, which will be cornstarch, baking soda, or baby powder.

To ensure maximum efficiency and meet time constraints, the steps in the procedure were performed quickly and but carefully. Most binary mixings produced clear colorless solutions, milky white solutions, or white precipitates. The mixings of the known solutions were recorded in Matrix 1; half of the fields were blocked out to prevent repetitions and same mixtures. The table produced many notable observations; for instance, water produced clear colorless solutions in all mixings and mixings with lead (II) nitrate usually formed precipitates. To identify the unknown solutions, qualitative analysis was performed on the unknown solutions and compared with observations of known solutions in Matrix 1. For example, Unknown Solutions 3 and 9 were easily identified as potassium iodide because of its

Combustion is a chemical reaction which is used in people’s everyday lives much more than people realize. Examples of combustion in everyday life include, gas-fueled cars, cooking on gas stoves, and heating our homes[2]. A combustion reaction occurs when a compound composed of only carbon and hydrogen reacts with oxygen to produce carbon dioxide and water. These reactants often release energy in the form of heat which is why they're able to fuel our cars and heat our homes.

In this lab a number of small experiments were conducted in order to observe the reactions of the materials tested. The purpose of this lab was to have real life experience with using observations to determine whether or not a chemical or physical change had occurred. Also this lab was used as an opportunity to improve the ability to write lab reports and make data tables, and to provide experience with unfamiliar lab equipment.

in Set 2, the Red highlighted cells with value difference greater than Set1 belong to the same