+ 3 e– Cr(OH)3(s) + 2 O2(g) b. CrO42–(aq) + 3 H+(aq) + 3 e– Cr(OH)3(s) c. CrO42–(aq) + 3 H+(aq) Cr(OH)3(s) + 2 e– d. CrO42–(aq) + 4 H2O( ) + 3 e– Cr(OH)3(s) + 5 OH–(aq) e. CrO42–(aq) + 3 OH–(aq) Cr(OH)3(s) + 2 O2(g) 4. Write a balanced chemical equation for the oxidation of Cd(s) by concentrated nitric acid‚ producing NO2(g) and Cd2+(aq). a. HNO3(aq) + Cd(s) Cd2+(aq) + NO2(g) + OH–(aq) b. 2 HNO3(aq) + Cd(s) Cd2+(aq) + 2 NO2(g) + 2 OH–(aq) c. HNO3(aq) + Cd(s) + H+(aq) Cd2+(aq) + NO2(g)
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Chemical Equilibrium: Le Chatelier Principle By Sarah Ramos and Kristina Todorovic Chemistry 203 DEN Dr. Mohamed El-Maazawi Part A. Acid-Base Indicators Purpose In this part of the experiment‚ we will find a reagent that will shift the acid-base equilibrium reaction described by Equation (2) in one direction and then a second reagent that will cause the equilibrium position to shift back in the opposite direction. Introduction An acid–base indicator
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conduct the experiment. 25 ml of The Bar Vodka was used and 7 ml of distillate was collected before a temperature of 95 degrees Celsius was reached. Collected distillate was then subjected to a flammability test to confirm ethanol content. The percent ethanol was computed to be 24%. Introduction Distillation is a method of separation for homogenous mixtures‚ which are composed of both volatile and nonvolatile substances [1]. It involves the volatile substance to undergo a phase change from a liquid
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Physical and Chemical Properties Purpose: The Physical and Chemical Properties lab provides the opportunity to investigate the physical and chemical properties of pure chemical substances and analyze the experiment results. Procedure: In the beginning of the experiment‚ I filled two 24-well plates half way with the given chemicals and sucked up these chemicals into their labeled pipets for later use. Following this‚ I performed a number of steps on each of the four test tubes and recorded observations
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Unix Operating System and Its File Structure Course: COSC513 Operating Systems Name: Deyong Xu ID: 103816 PREFACE This article is just an introduction of Unix operating system to people who don’t any knowledge about Unix operating system . Generally speaking ‚ people don’t need to understand too much about the details about a software or a system ‚ the most important thing is people should know how to use these software
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Hazardous chemical waste in the Liverpool area The aim of my research action plan is to address how people disposed of their hazardous chemical waste from households and schools within the Liverpool area. What is hazardous chemical waste? Chemical waste is a waste that is made from harmful chemicals such as: * Paint/ artist paint/ paint thinner * Motor oil * BBQ gas cylinders * Insect sprays * Rat poisons * Garden chemicals- fertilisers ‚ insecticides * Car wax
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Chemical Bonding Lab Chemical compounds are combinations of atoms held together by chemical bonds. These chemical bonds are of two basic types—ionic and covalent. Ionic bonds result when one or more electrons from one atom or group of atoms is transferred to another atom. Positive and negative ions are created through the transfer. In covalent compounds no electrons are transferred; instead electrons are shared by the bonded atoms. The physical properties of a substance‚ such as melting point
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Chemistry Internal Assessment: Determining the Enthalpy Change of a Displacement Reaction AIM: To determine the enthalpy change for the reaction between copper(II) sulfate and zinc. BACKGROUND THEORY: Bond breaking is endothermic while bond forming is exothermic. The reaction between copper(ll) sulfate and zinc is exothermic as the energy required to form the bonds of the products is greater than the energy required to break the bonds of the reactants. In an exothermic reaction‚ heat is
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Contents Did you stick to your plan? 2 Why were the changes beneficial? 2 Getting help from people 2 Step 1 Developing ideas 2 Step 2 Choosing a design 2 Step 3 Creating the product 3 Organisation 3 Communication 3 Collaboration 3 Information literacy 3 Reflection 3 Conceptual understanding. 4 Places that need safety on campus? 4 Questions Did you stick to your plan? I did not stick too many of my plans because I was a bit too ambitious. Some of my plans were not being able to be reached so although
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When you chance the way you look at things‚ the things you look at change. The most fundamental and mayor decision you have to make in your life is this: Do I live in a friendly or A hostile universe? Is it the universe‚ where people want to hate each other‚ kill each other. Is that what you see? Because when you see the world that way‚ that is exactly what you create for yourself. The interesting thing is that this is not just a clever play of words: When you change the way you look at
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