ELECTRODEPOSITED NI-BASED NANOCOMPOSITES ELECTRODEPOSITION • Electroplating is often also called "electrodeposition“. • It’s a process using electrical current to reduce cations of a desired material from a solution and coat that material as a thin film onto a conductive substrate surface. • The overall process is also known as electrolysis. OBJECTIVE • To apply thin films of material to the surface of an object to change its external properties such as to increase corrosion protection
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acid (H2SO4) and phosphoric acid (H3PO4). •Sulphuric acid can give rise to two series of salts and phosphoric acid to three series of salts depending on how many protons are replaced. •i.e. (a) H2SO4 → NaHSO4 → Na2SO4 (b) H3PO4 → NaH2PO4 → Na2HPO4 → Na3PO4 •NORMAL SALTS- These are salts which do not contain replaceable hydrogen. E.g. sodium chloride (NaCl). •ACIDIC SALTS-These are salts which contain replaceable hydrogen. This is because when the hydrogen is replaced they are acting like an acid.
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Chemical Reactions Lab Objectives: 1. To examine a variety of reactions including precipitation‚ acid-base‚ gas forming‚ and oxidation-reduction reactions. 2. To identify the products formed in these reactions and summarize the chemical changes in terms of balanced chemical equations and net ionic equations. 3. To identify the species being oxidized and reduced in oxidation-reduction reactions and determine which species is the oxidizing agent and the reducing agent. Chemical equations represent
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Purpose: The purpose of this lab is to develop a deeper understanding of LeChatelier’s Principle by observing several systems at chemical equilibrium and interpreting the effects of varying concentrations and temperature. The principle states that if systems at equilibria are altered or disturbed in any form‚ the equilibria will shift to reduce the disturbing influence ( Catalyst‚ 186). In a 3 part experiment‚ we analyzed the outcome of changes in reactant and product concentrations‚ equilibrium
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therefore‚ (+2) + (−4) + 2 × Cl = 0. The charge on Cl is 1+.) 2- A voltaic cell is constructed. One electrode compartment consists of a zinc strip placed in an aqueous solution of Zn(NO3)2‚ and the other has a nickel strip placed in an aqueous solution of NiCl2. E°red(Zn2+/Zn) = −0.76 V E°red(Ni2+/Ni) = −0.28 V Which one of the following occurs at the anode and which at the cathode? (i) Ni2+(aq) + 2e- Ni(s) (ii) Zn2+(aq) + 2e- Zn(s) (iii) Ni(s) Ni2+(aq) + 2e(iv) Zn(s) Zn2+(aq) + 2ea) i anode‚ iv cathode
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Chemistry Review (mid-term) 1. Use the equation for atomic mass to answer the following questions. (http://johnheilchem10.escuelacampoalegre.wikispaces.net/file/view/average+atomic+mass+calculations+-+3.pdf) 1. Argon has three naturally occurring isotopes: argon-36‚ argon-38‚ and argon-40. Based on argon’sreported atomic mass‚ which isotope do you think is the most abundant in nature? Explain. 2. Copper is made of two isotopes. Copper-63 is 69.17% abundant and it has a mass of 62.9296 amu.
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Percent Composition and Molecular Formula Worksheet 1. What’s the empirical formula of a molecule containing 65.5% carbon‚ 5.5% hydrogen‚ and 29.0% oxygen? 2. If the molar mass of the compound in problem 1 is 110 grams/mole‚ what’s the molecular formula? 3. What’s the empirical formula of a molecule containing 18.7% lithium‚ 16.3% carbon‚ and 65.0% oxygen? 4. If the molar mass of the compound in problem 3 is 73.8 grams/mole‚ what’s the molecular formula? Write the molecular formulas
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The effects of pH on mung beans Gloria Cheng Winsy Cheung Lily Wong Christine Yen January 15‚ 1998 Abstract This experiment explores how different pH environments affect the growth of mung beans. The mung beans were grown in water with various pH levels‚ consisted of pH levels 5‚ 6‚ 7‚ 8‚ and 9. A replicated design was used consisting of 3 runs for each pH level. The following results are listed in order of pH levels allowing most growth to least growth of the mung beans: 7‚ 8‚ 6‚ 5‚ and 9. These
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Richard Ortiz-Luis Sorenson‚ McClave 11 November 2012 Period 0 Examination of the Formation of Precipitates between Various Aqueous Solutions of Ionic Compounds 11/12/12 Background Information: A double replacement reaction is a chemical reaction that usually takes place between two aqueous ionic compounds. In the reaction‚ the cation of one compound replaces the other compound’s cation that yields two produce two new and different compounds. A precipitation reaction is a chemical reaction
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SOLVENT EXTRACTION Solvent extraction‚ also known as liquid extraction and partitioning‚ is a method to separate compounds based on their relative solubility in two different immiscible liquid‚ usually water and organic solvent. It is an extraction from one liquid phase to another liquid phrase. Liquid extraction is a basic technique in chemical laboratories‚ where it is performed using a separator funnel. This type of process is commonly performed after a chemical reaction as part of the work-up
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