hand in: 10 August 2011 Aim To prepare cobalt (III) acetylacetonate in the laboratory using cobalt (II) carbonate and acetylacetone at room temperature and pressure. Introduction The anion acetylacetone (acac) used in this practical functions as a ligand which forms a complex with the cobalt metal cation in an octahedral array where there is electrostatic bonds between the cobalt metal and both the oxygen’s of the acetylacetone to form a six membered ring1. Figure1: The 3-D
Free Oxygen Oxide Mole
Review of Related Literature Calamondin or Clamansi‚ Citrofornella microcarpa‚ belong to the fruit tree family Rutaceae. The fruit of the Calamansi is a small‚ round lime‚ a little bigger than the size of a thumbnail‚ about 30 mm (an inch) in diameter. Similar to other citrus fruits‚ the calamansi is high in vitamin C‚ and the juice can be an excellent vitamin basis. The lively ingredient D-limonene destroys the wax coating of the insects’ respiratory system
Premium Sodium chloride Ion Orange
The concentration of NH4 + 128 was determined using a cation column (C4-100‚ Metrohm AG) while NO3 - ‚ SO4 2- and NO2 - 129 were analyzed with an anion column (Supp4-250‚ Metrohm AG). 130 Total organic carbon (TOC) was analyzed by using a TOC analyzer (TOC 5000‚ Shimdzu). The samples 131 were filtrated by using a filter membrane (0.45μm‚ EMD Millipore)
Premium Chemistry Water Oxygen
Let re-learn some stuff and earn some points back. These are questions missed by most of you on the exam. You can only earn up to a maximum of 120 points total (your exam 1 score + what you earned here). One point per correctly answered question (20 points) 1. Oxidative phosphorylation requires all of the items listed below except a. ATP synthase in the correct position in the membrane. b. The flow of electrons from NADH to protein in the membrane. c. A matrix more positively charged
Premium Adenosine triphosphate Cellular respiration Metabolism
(with the exception of H). Metalloids border the stair-step line (with the exception of Al‚ Po‚ and At). Metals are on the left side of the chart. When atoms lose or gain electrons‚ they become ions. Cations are positive and are formed by elements on the left side of the periodic chart. Anions are negative and are formed by elements on the right side of the periodic chart. Ionic compounds (such as NaCl) are generally formed between metals and nonmetals Formula weight is the sum of the atomic
Premium Atom Ion Chemical bond
English Lab Instructor: Dr. Campo Date: Tuesday‚ February 5th 2013 Pre-Lab Questions A. Adding the acid to the sodium sulfate solution results in an increase in the solubility of any free anions present in the sample. This will happen because the present anions will bind with the hydrogen cations present in the acid. B. The sodium sulfate is boiled because experiments have shown that barium sulfate is 50 times more soluble at 100°C than at room temperature. At the higher temperature‚ the
Premium Solubility Chemistry Ion
the atmosphere to minerals from rocks and soils. The cations Ca2+ and Mg2+ are the most abundant species found in natural waters. These ions come from soluble sedimentary rocks such as limestone‚ dolomite‚ and gypsum.2 The presence of these dissolved ions in the water gives it a chemical property that is called water hardness. Water that is hard has a very high concentration of Ca2+ and Mg2+‚ as well as other dissolved cations and anions. Likewise‚ water that has a very low concentration of
Premium Water Hard water Calcium
Separation techniques LIQUID CHROMATOGRAPHY ‘THE ART OF SEPARATION’ CHROMATOGRAPHY – AN INTRODUCTION Chromatography is a technique through which a mixture of chemical components are separated‚ identified and determined accurately. This technique while provides a way for analytical separations‚ also useful for preparative techniques by which pure compounds can be obtained. Detector Signal Blue Compound Sample Injection + Mobile Phase Retention Time Red Compound It is i defined d fi d as a
Premium Chromatography High performance liquid chromatography
water in barium chloride dihydrate. 2. To determine the percentage of water in an unknown hydrate salt. 3. To calculate the water of crystallization for the unknown hydrate salt. Discussion A hydrate salt is composed of anions (negative ions) and cations (positive ions) which are surrounded by and weakly bonded water molecules. Each hydrate salt has a fixed number of water molecules associated with it‚ called waters of hydration or water of crystallization. When a salt holds waters
Premium Water Ion
Atomic structure: scientists 1. Democritus: 1st person to think of atom (500 BCE)- philosopher Atom is the smallest piece of an element that has same properties as the element. 2. Lavisier: Law of conservation of mass/ matter • Mass can’t be created or destroy; same amount of stuff 3. Joseph Proust: Law of constant composition (law of definite Proportions) • A compound is always made of the same elements in the same ratio. 4. John Dalton: English school teacher who derived the atomic theory
Free Atom Electron Electric charge