precipitate‚ MnO2‚ was observed. The reaction was then supported by the equations displayed below: Test Tube A (Neutral Media) Reduction Rxn: 2(MnO4- + 4H+ + 3e-) -> (MnO2 + 2H2O)2 Oxidation Rxn: 3(SO32- + H2O) -> (SO42- + 2H+ + 2e-)3 Net Ionic Eq’n: 2MnO4-(aq) + 3SO32-(aq) + 2H+(aq) -> 2MnO2(s) + 3SO42-(aq) + H2O(l) In test tube B‚ in which the reaction was done in acidic medium‚ it was observed that there’s no visible reaction. In this reaction‚ Mn2+ ion was formed. This ion is colorless
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have a positive or negative charge Anion- negatively charged ion Cation- positively charged ion Molecules- small‚ electrically neutral “units”; maintain the properties of that substance Formula unit- the lowest whole number ratio of ions in an ionic compound Products are on the right side of the yield sign Reactants are on the left side of the yield sign Coefficients are the whole numbers that we place in front of a substance to balance an equation. We correctly write the Nobel gases
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Instrument used to measure pressure- barometer • A sealed bottle that is half full of water‚ equilibrium will be attained when water molecules evaporate and condense at equal rates. • Polar- can tell the difference non polar- cant tell • Ionic is m+non metallic m+m covalent non+non • 2 types of intermolecular forces are van der walls & hydrogen bonds. • Ionization energy- E is required to remove an e- • Electronegivity- desire for electrons highest closer the the right
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ATOM Atoms are the basic building blocks of ordinary matter. Atoms can join together to form molecules‚ which in turn form most of the objects around you. Atoms are composed of particles called protons‚ electrons and neutrons. Protons carry a positive electrical charge‚ electrons carry a negative electrical charge and neutrons carry no electrical charge at all. The protons and neutrons cluster together in the central part of the atom‚ called the nucleus‚ and the electrons ’orbit’ the nucleus. A
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Laboratory 9 Lab title: Conductivity of solutions and Household Items PURPOSE: To understand the compounds that dissociate (break into ions) when dissolved in water. Determine ionic compounds are electrolytes. To identify solutions as electrolytic and non-electrolytic‚ and to identify variations in conductivity among electrolytes. Substances that are capable of conducting an electric current in solution are known as electrolytes. Substances that do not conduct an electric current
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Crystals form in the depths of the Earth to the extension of the clouds in sky. Some think that crystals elude the sight of people’s eyes everyday in life‚ but they are everywhere including ingredients for food‚ construction materials‚ and even in ice-cold weather. The crystals in this experiment are ammonia-generated crystals that can be created right in a home. The experiment will be testing the different effects and products on crystals in different temperatures and forms of light. Different measurements
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the molecule is slightly positive and the fluorine end is slightly negative. This causes hydrogen bonding between other hydrogen fluoride molecules. KCl – potassium chloride is a metal halide salt. The bonding between potassium and chloride is an ionic bond. The potassium becomes a cation and the chloride an anion. The potassium end of the molecule becomes slightly positive and the other end slightly negative. Na – sodium contains metallic bonding. It has a high melting due to the bonding and has
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Salts Name_____________________________________________________Date__________________ New Concept: Hydrolysis Reactions Review Concepts/Application: Writing chemical formulas‚ writing ionic equations‚ determining solubility‚ measuring acidity and basicity. Pre-Lab Discussion A salt is an ionic compound containing positive ions other than H+ and negative ions other than OH-. Most salts will dissociate to some degree when placed in water. In many cases‚ ions from the salt will react
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increase in the temperature will make the vibrational energy that each of the molecules to also increase. This change in the vibrational energy will affect the enzyme molecules because they are bonded closely together with the help of Hydrogen and Ionic bonds. Therefore the molecules will have weight
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2-A‚ 7th –A of periodic table? Q.4-Define Electro negativity/Electron Affinity/Ionization potential/Atomic radii CHAP NO.5 Q.1-Define ionic bond and explain about the formation of NaCl? Q.2-Define Covalent bonds and its types/Coordinate Covalent bond with example? Q.3-define Hydrogen bonding / London Forces/dipole –dipole forces Q.4-differentiate b/w ionic & covalent bond OR covalent & Coordinate covalent bond? CHAP NO.6 All Definitions CHAP NO.7 ALL definitions/Difference b/w solution and
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