VIHS/ Department of Chemistry Chemistry Revision Unit II (Edexcel) (01) a) When lithium nitrate and sodium nitrate are heated separately‚ both decompose giving oxygen gas as one of the products. (i) Which of these two nitrates would decompose at the lower temperature? .........................................................………………………………………….................... (ii) Give the name of any other product formed when sodium nitrate is heated. .....................................................
Premium Alcohol Sodium Iodine
Valuable Experience Gained During the Training Period The valuable experience that I gained during the training is when we are in the furnace of the boiler where the combustion takes place. The furnace is a internal parts of the boiler so we are taking the advantage to see what’s inside the boiler. We saw the generating tubes‚ bunker fuel injector‚ grates that we need to fix because of mis-alignment of the grates base. Grate is use for de ashing to avoid clogging up of the boiler. The second
Premium Hydrogen Sodium Carbon dioxide
Part Ca)Up until the 1940’s rubber had only been obtained from the latex of rubber trees(Hevea brasiliensis) in plantations situated in tropical areas such as Malaya and Burma. The demand for rubber increased significantly during world war 2 as rubber was needed for tyres of military vehicles and the supply was interrupted by the conflict between the countries. Scientists in Germany and the US developed synthetic polymers that could replace rubber. Even after the war ended the traditional sources
Premium Sodium Sodium chloride Sodium hydroxide
TMA04 Question 1 In TMA02 I asked my tutor to give me specific feedback on the learning outcome Ky1. I was advised that I should take a little more care with significant figures and scientific notation. There has not been much emphasis on significant figures and scientific notation in TMA04. However I have taken the advice given by my tutor and broadened it to include attention to detail in all areas dealing with numbers within this assignment especially in questions 2 ai) 2ci) & 3bi). Question
Premium Atom Ion
RESULTS AND DISCUSSION In the Iron (II) - Silver Ions System the reaction had a balance chemical equation of Fe2+ + Ag+ Fe3+ + Ag(S). The process if centrifugation is used in this part of the experiment to be able to separate the supernatant and the precipitate. And the supernatant will be used to test for the presence of Fe2+‚ Ag+ and Fe3+ in the solution. Results showed that there is a positive presence for FE 2+‚ Fe3+ and Ag+ because of the visible change of color of Prussian blue precipitate
Premium Hydrogen Chemistry Ion
steps 4 and 5 as needed until all octets are full. 7. Redraw the dots so that electrons on any given atom are in pairs wherever possible. Procedure for Negatively Charged Ions (CO32-) Use the same procedure as outlined above‚ then as a last step add one electron per negative charge to fill octets. Carbonate ion has a 2- charge‚ so we have two electrons available to fill octets. Using the procedure above‚ we arrive a this structure: The two singly-bonded oxygen atoms each have an open
Premium Electron Atom Electric charge
dissolve in water because the substance is nonpolar and will not attract to the water molecules. 4. The Ph scale is a tool in science used solubility of a substance. An acid is a substance that will form hydrogen ions when dissolved in water. Bases are substance that will produce hydroxide ions when dissolved. The number of the Ph scale represent how strong an acid is or . Examples of acids are stomach acids and lemo juice. Examples of bases are lye and soap. 5. F 6. F 7. f
Premium Chemical bond Atom Water
scientific supercomputer facilities. A number of methods to obtain electronic structures exist and their applicability varies from case to case. Part A: Lewis structure The Lewis structure is used to represent the covalent bonding of a molecule or ion. Covalent bonds are a type of chemical bonding formed by the sharing of electrons in the valence shells of the atoms. Covalent bonds are stronger than the electrostatic interactions of ionic bonds‚ but keep in mind that we are not considering ionic
Premium Chemical bond Atom Covalent bond
Scribd Extrascore Sample Questions - Answers Q.1: What are the µlaws of chemical combination¶? Ans: There are two important laws of chemical combination established by Lavoisier‚are as follows: (i) Law of Conservation of Mass The law of conservation of mass states that mass can neither be created nor destroyedin a chemical reaction.(ii) Law of Constant Proportions The Law of Constant Proportions which is also known as the Law of DefiniteProportions‚ was established by Proust
Premium Atom Ion Molecule
of the concentration of chlorine ions Aim: To compare the concentration of chloride ions in pool and tap water respectively. Background: Tap water contains a variety of dissolved ions such as Ca2+‚ Mg2+‚ Na+‚ HCO3- and Cl-. In this experiment we will determine the concentration of the Cl- ions‚ and comparing it to the concentration found in a sample of pool water. The method used is the standard one for determining the concentration of chloride ions: titration with silver nitrate
Premium Silver Chlorine Solubility