Reactant Lab

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

The purpose of this lab was to determine the limiting reactant in a reaction between copper sulfate and iron. Using the reaction between copper sulfate and iron, the reaction was observed to see the reaction and transformation of matter. The copper sulfate was placed into a beaker, as the excess reactant, then iron filings added until the heated solution was completely reacted. This reaction created an excess of leftover. The law of conservation of mass can be observed in this reaction, and using the data found, the percent yield calculated.

What is the percentage yield of the reaction of iron and copper chloride when steel wool and copper chloride dehydrate are used as reactions?

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.

Discussion The purpose of this lab was to measure the mass of a solid reactant, in this case, NaHCO3, which is also known as baking soda, and to find the mass of the solid product NaCl (salt) as well. From there, the masses were to be converted into moles and created into ratios that showed the relationship between the reactants and products. That information was then compared to the theoretical data in order to check its accuracy and reveal the significance of mole ratios in chemical reactions.. During the experiment, hydrochloric acid (HCl) was added to the baking soda in order to begin the reaction.

Is A+C a chemical reaction? Yes, because of serval chemical changes happening to the solution before and after. I came to this conclusion by using three pieces of evidence. The three pieces of evidence were a ph imbalance, a dramatic density rise, and a change in electroconductivity.

The purpose of this lab is to become more familiar with the products of different types of chemical reactions by conducting several chemical reactions and observing the changes that occurred. In addition, by performing various experiments, the observations will help in writing chemical equations, which represent the process involved in a chemical reaction. Overall, the chemical changes observed throughout can determine the products that are formed from the reactants. In chemical reactions, substances that are referred to as reactants produce other substances called products. There are several ways to determine that a chemical reaction has occurred, and which type of reaction has taken place, exothermic or endothermic, which will help predict

Type of Reactions We did a lab on many reactions to find the products of the reactions. We conducted four group experiments and three class experiments, following very strict safety procedures given to us by our instructor. We used goggles and aprons which were required at all times. We could not sniff any gasses or walk into clouds of smoke unless we were instructed to.

INTRODUCTION When two substances undergo a chemical reaction, often times one of the reactants will be completely used up before the other. This reactant is known as the limiting reactant. A limiting reactant is the substance that controls or limits the amount of product which can be formed.

There’s a difference between a chemical and physical prop-erties/changes. Physical properties are an aspect of matter that can be observed or measured without changing it. The Examples for Physical properties would include: color, smell, freezing point, boiling point, melting point, etc. While Chemical properies may only be observed by changing the chemical identity of a substance. An example for Chemical properties would be rusting iron.

This unti we learned about chemical reactions and this unit we mostly did labs and learned from that. There many ways to be able to get a chemical reactions. There are reaction rates and evidence for a chemical reaction. This unit the quession was what can I observe from a chemical reaction. There are many things you can observe when there is a chemical reaction.

Introduction : Chemical reactions are a process that involves, rearranging the molecular structure of substances to create new ones. There are about 5 types of reactions, however, the 3 most significant types are synthesis, (e.g. 2Na + Cl2 → 2NaCl); decomposition (CaCO3 → CaO + CO2); and finally combustion. Combustion is a rapid chemical combination of a substance (fuel) with oxygen, including the production of heat and light (e.g. CH4 + 2O2 → CO2 + 2H2O). In these types of reactions, bonds are broken and then formed to create the end product, which all requires the use or release of energy.

Alterations: After mixing the benzoic acid, p- dichlorobenzene, and m- nitroaniline with the diethyl ether inside the separatory funnel it resulted a yellowish color with a strong odor that makes you dizzy. Preparing an hydrochloric acid solution and mixing it with the mixture of diethyl ether and there three compound creates a layer in the separatory funnel. Shaking it and releasing the gas to mix the compound very well, but too much shake trap the bubbles in the center layer that separate the organic layer and aqeuous layer. It will take time to disappear the bubbles, so by shaking it slowly will avoid the forming of bubbles. The aqeuous layer formed a very light- yellow color and a “gello” like material and settled in the bottom of the separatory funnel, while the organic layer remain in the top. Draining the bottom which is the aqeuous layer and saving it later for the extraction of benzoic acid. Adding hydrochloric acid gave us a crystal white color in appearance with a purple color of litmus paper and ph level of 0.3, indicating an acidic solution and allowing it to precipitate. Pre- weighing the filter paper resulted a 0.31 g and after vacuum filtration and allowing it to dry, the filter paper with the compound weigh

One discrepancy that has to be explained would be for Part F(Chemical Reactivity Of Some Representative Elements), question 3 is we failed to obtain a result because time ran out before we could complete the experiment. However, based on my research, the calcium hydroxide salt would be more soluble than the magnesium hydroxide salt because the calcium is more reactive than magnesium. This is because calcium has 20 electrons thus, an electronic configuration of 2.8.8.2. However, magnesium has 12 electrons thus, an electronic configuration of 2.8.2 . In other words, calcium has four electron shells but magnesium has three making it easier for calcium to lose an electron as the distance between the nucleus and the electrons in calcium is further

Chemistry Practical Report Determining the Reactivity Series of Four Metals Introduction: In this experiment, students will determine a relative reactivity series based on the four metals provided, arranging them in order of decreasing reactivity. A series of reactions will take place in order to draw conclusions about the reactivity of the metals A, D, E, G reacting to the solutions A, D, E, G. Aim: To compare and determine the reactivity of the four metals, arranging them in order of decreasing reactivity, thus creating a reactivity series. Equipment: • Small piece of metal A , D , E and G • 20 mL of the solutions A , D, E and G • 12 test tubes • Test tube rack • Sandpaper • 4 beakers • Marker Safety: Hazard Safe Working Practice Cuts - Handle