Cu2+ (aq) + Zn (s) Cu (s) + Zn2+ (aq) E°cell = 1.06 V Cu2+ (aq) + 2e-
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English/Romanian Legal Glossary DICTIONAR DE TERMENI JURIDICI 1203.03 PC MOTION – Request to cancel‚ modify‚ change or terminate probation. MOTIUNEA PC 1203.03 – Cererea de anulare‚ modificare‚ schimbare sau incheiere a unei perioade de proba. 1203.4 PC MOTION – Request to take back guilty plea or set aside a guilty verdict‚ and dismiss the accusations or information. (Made after probation has either terminated or defendant was discharged from probation prior to termination.) MOTIUNEA PC
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(III) ion‚ in acid medium. c) the reduction of manganese dioxide‚ in acid solution‚ to give manganese (II) ion. 6. When copper metal is placed in concentrated nitric acid‚ the solution turns green and brown coloured NO2 gas evolved. Cu(s) + 4HNO3(aq) Cu(NO3)2(aq) + 2NO2(g) + 2H2O(l) a) Which element is reduced? b) Which element is oxidised? c) Which is the oxidising agent? d) Which is the reducing agent? 7. When metallic zinc is added to an aqueous solution of silver nitrate‚ zinc dissolves
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Dilute NaOH Mg Silver None None None None Base Fizzes‚ gas‚ increased temperature None Cu Brown None None None None Base None None Zn Silver None None None None Base Fizzes None MgO White Slight odor None None Bubbles Base Dissolves‚ turns yellow‚ increased temperature None CuCO3 Green None Melts‚ turned black and Gas Dissolves None Base Fizzes Turns blue Cu(NO3)2 Blue None Dissolves and turns green None Dissolves‚ turns green‚ gas Acid Dissolves
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return he beaker‚ with its contents‚ to your teacher for proper disposal. Do not pour anything down the drain. 5. Set up the filtration apparatus to collect your Cu from the AlCl₂. solution. Find the mass of your dry paper before you filter. 6. Remove Al from the filter paper‚ carefully rinsing them with water to prevent loss of Cu. 7. Dry Cu overnight and then find the mass when dry. Observations: Material Before After CuCl₂ -blue powder -crystalline solid
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an unknown sample. Therefore‚ it is useful to perform all of the characteristic reactions first on a mixture of ions of known identity‚ and then proceed to the unknown sample. Reactions Characteristic for Pb+2 Separation of Pb+2 from Fe+3‚ Al+3‚ Cu+2‚ and Ca+2 Out the five cations in the mixture‚ only lead ion will precipitate‚ as PbCl2‚ when hydrochloric acid is added to the solution. Pb2+ (aq) + 2Cl- (aq) PbCl2 (s‚white) Equation 1 The solid PbCl2 is separated from the solution containing
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Percent Copper and Formula of a Copper Compound Sofia Economides Date Preformed: 3/19/2012 Date Submitted: 3/26/2012 Lab Partners: Anita Smith‚ Taylor Bell‚ Derek Bourgeois 1. Purpose a. To determine the percent of copper and the formula weight of a copper compound. 2. Introduction a. Magnesium is a very active metal which can reduce copper (II) ions in a weight sample of a compound to metallic copper. The reduction of copper ions in a compound to a copper metal
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NO-3(aq)+Na+(aq) • Cu(NO3)2(aq)+NaOH(aq) → Cu(OH)2(s)+ NO-3(aq)+Na+(aq • Ni(NO3)2(aq)+NaOH(aq) → Ni(OH)2(s)+ NO-3(aq)+Na+(aq) • Al(NO3)2 (aq)+NaOH(aq) →Al(OH)(s)+ NO3-(aq)+Na+(aq) • Al(NO3)2 (aq)+NH4OH(aq) →Al(NH4)6+ (s)+ NO3-(aq)+Na+(aq) • Mn(NO3)2 (aq)+NaOH(aq) →Mn(OH)2(s)+ NO3-(aq) +Na+(aq) • Pb(NO3)2 (aq)+H2S(aq)↔PbS2(s)+ S2-2(g)+NO3-(aq) • Ag(NO3) (aq)+H2S(aq)↔ AgS2(s)+ S2-2(g)+NO3-(aq) • Ba(NO3) (aq)+H2S(aq)↔No reaction existed • Fe(NO3)2(aq)+H2S(aq)↔ Fe2S3(s)+ S2-2(g)+NO3-(aq) • Cu(NO3)2(aq)+H2S(aq)↔
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CU represent the increase in absorbance (at 400 nm) per minute in the total assay volume where catechol is the substrate. The activity was then converted to the relative activity of catechol (in CU/μL)‚ relative activity represents the CU over the volume of enzyme added. The data obtained was then used to generate an Eadie-Hofstee plot to display the kinetic trend of
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Empirical Formula of Copper (II) Chloride Gabriella Jane Lukas B1401404 HELP University Empirical Formula of Copper (II) Chloride Objectives 1. To validate that the empirical formula of copper (II) chloride is . 2. To calculate the percent composition of copper in copper (II) chloride. 3. To illustrate the Law of Constant Composition in copper (II) chloride. 4. To study the reaction between copper (II) chloride solution and aluminium metal. Introduction One of the most fundamental statements
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