weak bases). After ranking the pH of these solutions‚ you will then test your predictions in the laboratory. 1. Arrange the following 0.1 M solutions in order of increasing pH and state why you placed each solution in that position: NaCH3COO‚ HCl‚ HCN‚ NaOH‚ NH3‚ NaCN‚ KNO3‚ H2SO4‚ NH4Cl‚ H2SO3‚ NaHCO3‚ Na3PO4 and CH3COOH. In order of increasing pH: H2SO4: This is because the first hydrogen is strong and completely ionizes and the second is weak and ionizes very
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as the candies can stick on the end of a toothpick without falling apart and there are at least three colors to represent different elements in a molecule. Procedure: 1. Draw the Lewis structure for each of the molecules listed below. CCl2F2‚ HCN‚ H2O‚ NH3‚ H2S‚ SO2‚ PCl4+‚ NO3-‚ O3 1. Build a model of each of the Lewis structures using candy and toothpicks. In each molecule‚ represent each element with a different colored candy. Each toothpick represents two electrons. A toothpick between
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CH3COO–‚ which substances are bases according to the Brønsted–Lowry definition? (A) CH3COOH and H2O (B) CH3COOH and CH3COO- (C) H2O and CH3COO– (D) H3O+ and CH3COO– 4. In the reaction CN– + H2O HCN + OH–‚ which is an acid–base conjugate pair? (A) H2O and HCN (C) CN– and H2O (B) H2O and OH– (D) HCN and OH– 5. Which species is not either an Arrhenius acid or base? (A) HCO3– (B) NaOH (C) HIO4 (D) NH3 6. When we say an ion or a molecule is a base‚ we mean that it has a tendency to (A) combine
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www.kalvisolai.com 5 Mark Compulsory Problems with Solution 1 +2 CHEMISTRY Q. 70 Compulsory Problems with Solution Problems are solved in easiest way (As per Government Answer Key) www.kalvisolai.com 5 Mark Compulsory Problems with Solution 2 SALIENT FEATURES Dear Students ❆ Q.No: 70 is asked as compulsory problem in Govt Exam. ❆ Two problems to be answered out of four problems. ❆ To simplify the problem‚ hints and expected compounds related to molecular formula‚ general formula are
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contemporary world’. This paper will treat the right of a citizen of the Union who has exercised his/her right freely to move within the current twenty seven European Union Member States‚ to be accompanied or joined by his /her third country national (TCN) spouse‚ in spite of the latter’s illegal residence. The provisions of Directive 2004/38/EC on the right of citizens of the Union and their family members to move and reside freely within the territory of the Member States (citizens’ rights Directive)
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“Transnational Corporation (TNCs) have frequently brought disaster to the local communities in whose regions they invest.” Debate the validity of this claim‚ with supporting evidence and reasoned arguments. 1.0 Introduction TNC or also known as Multinational Corporation (MNC) is a decentralize-national company which primarily has locus of management controls over its subsidiaries in whose region they invest (Shinsato‚ 2005); (Stonehouse ‚ 2000). Although many statements by Daniels‚ (2004)
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molecule is linear‚ your arrows point from H to C and then C to N. If you add the arrows together‚ you get a bigger arrow from H to N which represents the net dipole‚ or the dipole moment. Anything with a dipole moment greater than 0 must be polar‚ thus HCN is polar. 5.) a. Sulfur hexafluoride‚ abbreviated as SF6‚ is a nonpolar molecule. SF6 has an octahedral molecular geometry‚ which means that the sulfur molecule has six fluorine atoms surrounding it. While each individual bond is polar‚ there is no
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Balancing Individual Privacy with Press Freedom Alan F. Westin‚ a privacy expert at Columbia University‚ once wrote: Privacy is the claim of individuals‚ groups‚ or institutions to determine for themselves when‚ how‚ and to what extent information about them is communicated to others (self information control right). In this age of mass media‚ individual privacy has become a casualty of journalists’ feeding frenzy and it has become really hard for societies to determine the nature and process of
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CHAPTER 3 – MEETING LEGAL CHALLENGES The Constitution & the Charter of Rights - The Constitution Act‚ 1982 replaces the acts and orders contained in the British North America Act‚ 1867‚ and today is the “supreme law” of this country - Section 52 (1) of the constitution proclaims that: The Constitution of Canada is the supreme law of Canada‚ and any law that is inconsistent with the provisions of the Constitution is‚ to the extent of the inconsistency‚ of no force or effect - Sections 1-34
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Molecule Polarity PhET Lab A study of electronegativity‚ bond polarity‚ and molecular polarity Introduction: In this atomic-level simulation‚ you will investigate how atoms’ electronegativity value affects the bonds they produce. When two atoms bond‚ a pair of electrons is shared between atoms. Electronegativity is a measure of a single atom’s ability to hoard electrons shared in that bond. In this lab you will work diligently‚ at your own pace‚ to answer a number of questions. To begin‚ from
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