Qualitative Analysis 2.Objective-We are observing how chemical reactions in aqueous solutions cause visual change.The pollutant and the ion are added which is referred as a reagent. 3.In this experiment we analyze the color change when mixing Reagents and Ions. We also received a unknown ion that we had to identify by comparing it to the other ions.Some terms that must be known are pollutants which is a substance that pollutes something, especially water or the atmosphere. Also you must know what reagent means which is a substance or mixture for use in chemical analysis or other reactions. 4.List of materials/equipment and Safety Precautions -Ions -Reagents -Dropper -Tray Safety Precautions- When doing this experiment we had to work with reagents that are acidic. We had to be careful when dealing with these chemicals. We made sure that our goggles on to avoid any of these chemicals to reach our eyes. Also we made sure to use a dropper when transferring the acid to the tray so that we don't come in contact with it. Lastly make sure the beakers are clean on the outside because when someone else holds it they're hands can be exposed to the acid. …show more content…
Also a tray was provided that would be used to mix the ions and reagents. One by one the reagents and ions were mixed. Everyone had to make sure to write down what they observed. Some things that were noticed was color change,smell,texture, precipitation, and so on. Lastly the unknown ion must be identified by comparing it to the other ions. When the ion was mixed with the reagents there were only one change which is that it became a clear
Equipment- 250mL beaker, 125mL Erlenmeyer flask, cardboard square, chemical scoop, metric ruler, lab countertop, rubber stoppers, safety goggles, lab apron
Procedure: In this experiment, various chemicals were mixed together, to determine a reaction. Using two drops from chemical 1 and two drops of chemical two, unless otherwise stated, then recording the type of physical reaction or color changes that occurred.
7) If you add HCl, you are increasing the [H⁺] in the system. Equilibrium will shift right causing the colour change from yellow to orange.
What is the appearance of reactant, Evidence of chemical reaction, and properties of a product?
After all materials were gathered, we then had to do five different tests to determine what the powder material does. The first test was to see what the powder materials do in water. We had to add a scoop of each of the common powders to an
The main objective of this experiment is to differentiate between a physical change and a chemical change.
To determine which ions are present in the two unknown solutions. This will be accomplished by mixing three known solutions with three testing solutions. You will use this information to determine which ions are present in the unknown solutions.
In this experiment you will observe some physical and some chemical changes. You will observe that energy must be used to start some chemical reactions, and that it is produced in others.
The start of the experiment consisted of filling up four beakers with de-ionized water to 150 ml. After the beakers were filled to the appropriate amounts they were then labeled with the
The Materials that were used to measure the experiment where a pen and paper to record the reactions of the subjects being tested, and the subjects themselves.
Aim: The aim of the lab “Chemical Equilibrium” is to observe the effects of changes in concentrations of products and reactants on the position of the equilibrium of given chemical reactions.
Product bubbled upon addition to the hydrochloric acid; liquid turned cloudy ¡V precipitate was present; zinc sample disintegrated slowly and turned black in color.
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?
Politics is a bloodsport, one big game of corruption, muckraking, prostitution, and defilement, which is played by the politicians, the media, and the seemingly innocent public that tends to forget that politicians are humans also, no better than the masses except for one thing, the ability to play the game. Primary Colors by Anonymous portrays this fraudulent game perfectly, exhibiting all of the dark aspects of a political campaign: from the vicious media in their pursuit of scandals, to the traitorousness of opposing candidates to destroy each other, all the way to the secretive sexual interactions taking place during the campaigning process. Yet in this vice-corrupted novel, Anonymous also manages to let the human side of the tainted
This report expresses five different pigments that were formed during chemical reactions. Three out of the total five reactions went through a metathesis, or double-replacment reaction. A metathesis reaction can be defined as “a chemical reaction in which an element or radical in one compound exchanges places with another element or radical in another compound.” (Webster). The other two pigments underwent a neutralization reaction, which is “A reaction between an acid and a base that yields a salt and water.” (Webster). In both types of reaction two substances are being combined to form a new solution. The metathesis reaction produces a solution and a