Chemistry AP Chapters 4 and 5 Practice Test 1. Which of these compounds is a weak electrolyte? A. HCl B. CH3COOH (acetic acid) C. C6H12O6 (glucose) D. O2 E. NaCl 2. The balanced net ionic equation between aqueous diethyl ammonium chloride and aqueous potassium hydroxide contains which of the following species? A. KCl(s) B. 2 OH-1 C. (CH3CH2)2NH2 (aq) D. H3O+1 E. (CH3CH2)2NH2+1 (aq) 3. In the chemical reaction 5H2O2 + 2MnO4-
Premium Chemistry Oxygen Base
Title: Flame Test Aim: To determine the cation in each of the unknown substance X‚ Y and Z by observing the flame colour of different metal compounds. Introduction: A distinctive feature of many s-block metals is their ability to produce flame colours. At temperature of a Bunsen flame‚ a compound will decompose to give gaseous atoms of its constituent elements. When an electron in the gaseous atom absorbs energy from the flame‚ it will move from an orbital with lower energy to
Premium Sodium chloride Flame test Potassium
oxides of nitrogen on reacting with metals while other acids react with metals to evolve hydrogen. xxii) Burning magnesium continues to burn in nitric oxide while burning Sulphur extinguishes. xxiii) Phosphorous does not form phosphorous penta-iodide. xxiv) Phosphorous acid is a dibasic acid. xxv) (SiH3)3N is a weaker base than (CH3)3N. xxvi) Mg3N2 when reacted with water gives off NH3 but HCl is not obtained from MgCl2 on reaction
Premium Ammonia
Chemical Bonds Chemical Bond: is the force that holds atoms together in a compound. They form because they lower the potential energy of the charged particles that compose atoms. Chemical bonds can be broadly classified into two types: Ionic and Covalent. Ionic: metal & nonmetal Metals have a tendency to lose electrons and nonmetals have a tendency to gain them. The metal atom becomes a cation and a nonmetal becomes an anion. The oppositely charged ions attract one another and form an ionic
Premium Chemical bond Ion Atom
Often times the management of chronic wounds can become challenging for clinicians. In the article by Sibbald et al (1) they emphasize that wound healing should be achieved through an interprofessional team approach where the focus is holistic‚ focusing not only on the patient’s wound but on the patient as a whole. Once the cause of the wound is identified‚ the wound can be classified into three categories: healable‚ maintenance and non healable (1). Referring to the wound bed preparation paradigm
Premium Wound healing Infection Wound
Determining activation energy (Ea) of a reaction © KCl http://hk.geocities.com/fatherofchemistry Objective To determine the activation energy for the reduction of peroxodisulphate(VI) ions. S2O82-‚ by iodide ions I-‚ using a ’clock’ reaction. Principle The equation for reduction of S2O82- by I- is: S2O82- + 2I- → 2SO42- + I2 The formation of iodine is ’monitored’ by small & known amount of thiosulphate ions‚ S2O32-:
Free Chemical reaction Chemical kinetics Reaction rate
Observations and Chemical Changes By: Andre the Giant Higgson 02/19/14 CHE 107 E1 Intro to Chemistry 1 Objective Certain Chemicals like Bromthymol blue and Phenolphthalein can be added to other chemicals to determine acidity or basicity. Other reactions can be observed as well when different chemicals are added to each other. Procedure This experiment involved placing drops of specified chemicals into a well on a 96well plate. Each well number was recorded along with question number and name of chemicals involved
Premium Chemical reaction
Kinetics of a Reaction I. List of reagents & products 1. 1.0 M Copper(II) nitrate (Cu(NO3)2‚ 0.10 M Hydrochloric Acid (HCl)‚ 0.010 M Potassium Iodide (KI)‚ 0.040 M Potassium Bromate (KBrO3)‚ 0.0010 M Sodium Thiosulfate (N2S2O3)‚ 2% Starch solution‚ Water (H2O) II. Summary of Procedure. Part 1: Find the Volume of One Drop of Solution 2. Fill pipet with 3ml of distilled water 3. Mass a beaker and record 4. Put 5 drops of water into beaker and record
Premium Chemical reaction Potassium Liquid
Electrolysis a) Electrolysis is the decomposition of a substance to give simpler substances. The substance being electrolysed has to be an ionic compound. b) The substance being decomposed is called the electrolyte. c) In electrolysis the electric current enters and leaves the electrolyte by conducting rods called electrodes. The positive electrode is called the anode and the negative electrode is called the cathode. d) For electrolysis to occur the electrolyte must be in liquid form so that
Premium Sodium chloride Hydrogen Electrolysis
Jillian Bradby Persuasive Essay March 15‚ 2015 English 101 CHEMTRAILS: The Silent Killer of Man and Earth Major disasters attract major attention. Whenever a plane crashes or a hurricane makes landfall‚ the event draws international news coverage and countless internet postings. Most of the time‚ people look towards experts‚ when they try to explain the science behind why a certain event happened‚ but for a small and vocal segment of society‚ the “truth” is hardly that at all. Enter the conspiracy
Premium Conspiracy theory Science Truth