An Investigation into Electrolysis - Copper Sulphate
Introduction
Decomposition caused by electricity is called electrolysis. The
electrical energy causes a chemical change. When a salt is dissolved
in water, its ions become free to move so the solution can be
"electrolyzed." The products of the electrolysis depend on the
chemical solution, its strength and the type of electrode. The cathode
is negatively charged and therefore attracts to it positive ions. E.g.
hydrogen. The more reactive substance stays in the solution whereas
the less reactive is released and appears as a gas (hydrogen) or a
coating of metal. At the anode (positively charged) the negative
charges are given up; for example chlorine or oxygen ions become
elements.
Electrolysis is used to produce gases or purify metals.
PLAN
Aim: To find out if the current being transferred through copper
sulphate affects the amount of copper transferred.
Prediction: I predict that as the amount of electrical current is
passed through the copper sulphate solution more copper will be
transferred. I also predict that the rise in electrical current and
the rise in copper transferred will be related, and follow a trend.
e.g.
Text Box: Copper Transferred[IMAGE]
I believe that as the current doubles so will the amount of copper
transferred.
E.g. 1amp = 0.1 gram of copper transferred - 2amps = 0.2 grams of
copper transferred.
I think this will happen because it is logical that when something is
doubled the affected will be doubled as well. Also to back up my
theory is Faraday's Law:
Faraday's First Law of electrolysis states that:
"The mass of any element deposited during electrolysis is directly
proportional to the number of coulombs of electricity passed"
Faraday's Second Law of electrolysis states that:
"The mass of an element deposited by one Faraday of electricity is
equal to the atomic mass in grams of the element divided by the number
of electrons required to discharge one ion of the element."
Research:
I have researched other possible ways to work out a rough idea of what
The experiment we did was Copper Cycle. We reverted the copper to its elemental form after a chain of reactions. We performed a series of reactions, starting with copper metal and nitric acid to form copper (ii) nitrate. Then we reacted copper with sodium hydroxide, sulfuric acid, nitric acid and zinc to form precipitates. In conclusion our percent recovery was 40.38%.
An atom, by definition, is the smallest part of any substance. The atom has three main components that make it up: protons, neutrons, and electrons. The protons and neutrons are within the nucleus in the center of the atom. The electrons revolve around the nucleus in many orbitals. These orbitals consist of many different shapes, including circular, spiral, and many others. Protons are positively charged and electrons are negatively charged. Protons and electrons both have charge of equal magnitude (i.e. 1.602x10-19 coulombs). Neutrons have a neutral charge, and they, along with protons, are the majority of mass in an atom. Electron mass, though, is negligible. When an atom has a neutral charge, it is stable.
Electrolytes are substances that have the capacity to conduct electricity when it is dissolved in water. In an “electrolytic solution”, if two electrodes, one being positive and the other negative, are placed in the solution then ions have the ability to transport free electrons to and from both of the electrodes. Electrolytes have the ability to created currents, however a stronger electrolytes will be able to conduct more current than a weaker electrolytes. Acids in a solution are good electrolytes since the acids supply the solution with hydrogen ions. If a solution contains organic compound has sugar or starch, then that solution won’t conduct electricity well since organic compounds are contributing as many hydrogen ions as acids. Electrolytes can be found in modern technology and allow them to function for example power watches, cars, and flashlight rely on electrolytes to be able to function. In these
Copper deposits can be found worldwide, and they are often associated with convergent plate boundaries. Copper ore is typically a mineralized system related to felsic intrusions, their composition ranges from granitic to grandodioritic. When Earth’s oceanic crust subducts beneath continental crust, a partial melting occurs, creating magma that typically has high amounts of copper. Once this magma cools, it forms large igneous intrusions, called batholiths. The crustal abundance of copper in mafic magmatic rocks is about 100 ppm, and in felsic rocks it is about 10 ppm, with the average crustal abundance around ~68 ppm (Pohl, 2011). The most economically profitable deposits are disseminated veins. Most of the copper deposits in the world are
The Effect of the Amount of Sodium Chloride on the Electric Current During Electrolysis Background When an electric current passes through sodium chloride solution, chemical reactions take place at both cathode and anode. If one passes through sodium chloride solution, there will be passage of ions moving through this solution. This results in positively charged sodium ions, which have been dissolved into the solution, moving towards the cathode and deposited there. At the same time, negatively charged chloride ions will be moving towards the anode and discharged at the anode. This is called electrolysis.
Copper Sun is a book about a fifteen year old girl named Amari who was stolen from her village by white slave traders, and lived a horrible life as a slave until she finally escaped.
The Rate of Electrolysis Of Copper Chloride Solution. Introduction We are going to find out what things affect the rate of Electrolysis. and to find this out we will use copper chloride salt dissolved in water to form a solution. The salt is dissolved in water.
Electroplating Experiment Aim To find the amount copper gains or loses on the electrodes using different amounts of current each time during electrolysis. How the changing of current affects the electroplating of copper. Introduction Electroplating is generally carried out in order to improve the appearance or corrosion resistance of the surface of a metal by electrodepositing a thin layer of metal ion on it. The metal substrate to be coated is made by the cathode in an electrolytic cell. The cell used in electroplating contains an electrolyte which is usually an aqueous solution containing a reasonably high concentration of an ion of the metal which is to be electroplated on the surface.
Copper is a trace mineral found in all bodily organs. It works in conjunction with iron to produce red blood cells. It's also necessary for helping the body store and absorb iron. While copper deficiency is relatively rare in modern society, not getting enough of this mineral can be detrimental to health. Symptoms of copper deficiency may include anemia, arthritis, bruising, fatigue, frequent illness, and unexplained weight loss. Although copper is an essential mineral for survival, it isn’t made by the body. Therefore, to get enough copper, you’ll need to obtain it through the diet.
Copper is an important element that has a significant role the function of enzymes. Copper acts as a cofactor in many essential enzyme reactions such as those involved in metabolism. Nevertheless, copper is a redox-active transition metal and is linked to generating reactive oxygen species (ROC). Especially under anaerobic conditions when copper is in its oxidative state. So copper can be highly toxic to cells and lead to cell death even in very low concentration. Its antimicrobial properties are evident by its use by white blood cells such as phagosomes as a mechanism for killing engulfed microbes. Staphylococcus aureus contains copper related genes, such as copA, which allow it to tolerance of excess copper, are virulence mechanisms.
The chemical change is that in which the material loses or gains electron (oxidation or reduction). The process is proceed in an electrolytic cell, an apparatus consisting of positive and negative electrodes placed apart and placed in a solution contains positive and negatively charged ions. The material to be transformed can be form the electrode, may constitute the solution, or may be dissolved in the solution. Electric current enters through the negatively charged electrode (cathode) positively charged components of the solution travel to this electrode, combine with the electrons, and are transformed to neutral elements or molecules. The negatively charged components of the solution travel to the other electrode (anode), release their electrons, and transformed into neutral elements. If the substance which is to be transformed is the electrode, the reaction is generally one in which the electrode dissolves by giving up
of Copper Sulphate. To do this I plan to work out the amount of water
To investigate the temperature change in a displacement reaction between Copper Sulphate Solution and Zinc Powder
Electrolysis Investigation Planning In this investigation, I will assess how changing the electric current in the electrolysis of acidified water affects the rate at which hydrogen gas is produced. The solution to be electrolysed is made up using acid and water. It is of little consequence what acid is used however in this case I will use Sulphuric acid (H2SO4). When H2SO4 is put in water it is dissociated and forms ions: H2SO4 → 2H (2+) + SO4 (2-) Ions are also present from the water in the solution: H2O → H (+) + OH (-) During the electrolysis process, the positive hydrogen ions move towards the cathode and the negative hydroxide and sulphate ions move towards the anode.
.... The first law of electrolysis is “the weight of a substance formed at an electrode during electrolysis is directly proportional to the quantity of electricity that passes through electrolyte”. The second of law of electrolysis is “the weight of different substances formed by the passage of the same quantity of electricity is proportional to the equivalent weight of each substance”. This experiment also showed Michael Faraday about oxidation and reduction.