Freem an‚ Biological Science‚ 4e‚ Chapter 4 Chapter 4 - Nucleic Acids and the RNA World Learning Objectives: Students should be able to... • Sketch a nucleotide‚ label its three basic parts‚ and identify the 2’‚ 3’‚ and 5’ carbons. • Make another sketch showing the primary and secondary structures of DNA. • Describe the primary‚ secondary‚ tertiary‚ and quaternary structures of RNA‚ and explain in what ways RNA differs from DNA. • Explain why and how the secondary structure of DNA allows
Free DNA
Synthesis of Salicylic Acid and Potentiometric Determination of its Purity and Dissociation Constant ------------------------------------------------- Abstract The purpose of the study is to synthesize salicylic acid from the ester‚ methyl salicylate‚ and determine the acid’s dissociation constant and purity. The ester was converted to salicylic acid by base hydrolysis. The products were refluxed and recrystallized‚ to ensure maximum purity‚ and filtered‚ dried‚ and weighed. The melting point
Premium Titration Acid dissociation constant Acid
KINETICS OF THE ACID DECOMPOSITION OF THIOSULFATE Aqueous solutions of thiosulfate‚ S2O32-(aq) are stable if neutral or basic‚ but decompose quickly when the thiosulfate is dissolved in acid according to the equation: Sulfur dioxide is a gas at room temperature‚ but is very soluble in water. Sulfur‚ a water insoluble solid‚ forms a colloidal suspension. As a result‚ the solution first becomes cloudy and then opaque. We can take advantage of the developing opacity of the reaction system to do a
Premium Rate equation Chemical kinetics Reaction rate
MANUFACTURE OF SULPHURIC ACID IN INDUSTRY 1. Contact process produces more than 90% of the world’s sulphuric acid. 2. The raw materials used for the manufacture of sulphuric aced are sulphur‚ air and water. 3. The Contact process consists of three stages. a) Production of suphur dioxide b) Conversion of sulphur dioxide to sulphur trioxide. c) Production fo sulphuric acid 4. Stage I: Production of sulphur dioxide a) Sulphur is burnt in air to produce sulphur dioxide. S(s) + O2 (g)→SO (g) b) Burning
Premium Sulfuric acid Oxygen Sulfur dioxide
Chapter 13 Acids and Bases (Dr Chong Fai Kait) 1) A 7.0 103 M aqueous solution of Ca(OH) 2 at 25.0 °C has a pH of __________. A) 12.15 B) 1.85 C) 1.4 102 D) 7.1 1013 E) 11.85 Answer: A 2) The acid-dissociation constant at 25.0 °C for hypochlorous acid (HClO) is 3.0 108 . At equilibrium‚ the molarity of H 3 O in a 0.010 M solution of HClO is __________. A) 1.7 105 B) 0.010 C) 5.8 1010 D) 4.76 E) 2.00 3) Using the data in the table‚ which of the conjugate acids below is the weakest
Premium Chemistry Acid Base
Introduction: Acid rain increases the rate of corrosion on statues made of certain material. The town council wants to build a statue that will not be affected by acid rain. In this experiment‚ three different types of rock are used on vinegar (acting as acid rain). The rocks used are marble‚ granite‚ and red sandstone‚ which are the most popular forms of rocks used to build monuments. Each type of rock will be submerged under 20 ml of vinegar in their own separate container. The pH of acid rain around
Premium Water Carbon dioxide Oxygen
Hot sauce | 5 | 3 | Questions 1. Compare and contrast acids and bases in terms of their H+ ion and OH- ion concentrations. An acid produces hydronium ions by donating a proton H+ to water. Base produces hydroxide ions OH- by accepting a proton from water. Acid and Base are opposites‚ when acids and a base counter balance which other it is neutral. 2. Name two acids and two bases you often use. The two acids I often use are Lemons and Hot sauce. The two bases I often use are
Premium
variations within a class of molecules allows for a greater diversity of functions. Focus on antibody variations. During an immune response‚ the white blood cells including T cells and B cells bind to the antigen. Antigens are chemicals released from invading pathogens or toxins. The binding of antigen to the antigen receptors of T cells or B cells help activate and secrete antibodies to bind to the antigen receptor protein on the membrane of a pathogen. The binding of antibodies to a specific
Premium Protein
1.0 Aim The purpose of this experiment is to use Volumetric Analysis to determine the concentration of acetic acid in white vinegar. 2.0 Theory The concentration is a measurement of relative amounts of solute and solvent. There are many diverse ways of expressing concentration but the most accepted and widely used is molar concentration and regularly referred to as molarity which is defined in mole‚ the amount of solute dissolved in one litre of solution. [pic] In this experiment there
Premium Titration
measuring cup (250 mL) * Hot water * 1 chiken bouillon cube * 3 small clear cups * 1 measuring spoon (5mL) * White vinegar * Masking tape * Marking pen * Table salt Procedure 1. Fill the measuring cup with hot water from the faucet. Add the bouillon cube and wait for it to dissolve. Divide the solution equally among the three cups. 2. Add one spoonful of vinegar to the first cup. Using masking tape and pen‚ mark the cup “vinegar”. Add one spoonful of salt to the
Premium Acid Water Measuring cup