Topic : Determination of the amount of dissolved oxygen in a water sample by iodometry-the winkler’s method. Objective: To determine the amount of dissolved oxygen in a water sample by iodometry- the winkler’s method. Apparatus: volumetric pipette‚ 3 conical flask‚ burette‚ burette clamp‚ Pasteur pipette‚ reagent bottle‚ conical flask stopper‚ retord stand‚ white tile Materials: 2 ml manganese sulphate solution‚ 2 ml alkaline-iodine solution‚ 0.025M sodium thiosulphate solution‚ 2ml concentration
Free Iodine Sulfuric acid Titration
your own and without assistance‚ complete this Lab 1 Answer Form electronically and submit it via the Assignments Folder by the date listed on your Course Schedule (under Syllabus). • To conduct your laboratory exercises‚ use the Laboratory Manual that is available in the WebTycho classroom (Reserved Reading or provided by your instructor) or at the eScience Labs Student Portal. Laboratory exercises on your CD may not be updated. • Save your Lab 1 Answer Form in the following format: LastName_Lab1
Free Scientific method Hypothesis Observation
Exercise 1: Data Interpretation Table 1: Water Quality vs. Fish Population Dissolved Oxygen 0 2 4 6 8 10 12 14 16 18 Number of Fish Observed 0 1 3 10 12 13 15 10 12 13 1. What patterns do you observe based on the information in Table 1? As dissolved oxygen is increasing the number of fish are being observed more. When dissolved oxygen is at 12‚ the number of fish observed peaked at 15 and then falls. 2. Develop a hypothesis relating to the amount of dissolved oxygen measured
Free Scientific method Hypothesis Water
Winkler method for dissolved oxygen determination Abstract In this study the group has determined the presence of oxygen in sample through a modified winkler method. The amount of oxygen is determined through a series of reaction. A body of water can sustain life if dissolved oxygen is sufficed. Depletions in dissolved oxygen can cause major shifts in the kinds of aquatic organisms found in water bodies. Introduction The amount of dissolved oxygen present in water or wastewater is essential
Premium Water Oxygen Sewage treatment
Water Quality Monitoring at Pulau Bidong Muhammad Amirul Siddiq B Abd Rashid UK 28208 Dr Hasrizal Shaari Table of Content 1.0 Introduction 2.0 Literature Review 2.1 Nitrite-Nitrogen (NO2—N) 2.2 Chlorophyll-a 2.3 pH 2.4 Salinity 2.5 Dissolved oxygen 2.6 Total Dissolve Phosphorous 2.7 Temperature 3.0 Methodology 3.1 Sampling Area 3.2 Sampling Method 3.3 Hydrolab Data 3.4 Laboratory Analysis 3.4.1 Cholorphyll a 3.4.2 Phosphorous
Premium Water PH Oxygen
Dissolved Oxygen and Aquatic Primary Productivity Lab AP Biology Procedure: 1) Have two containers ready‚ one with ice water a little bit above freezing‚ and the other with hot water just below the boiling point. 2) Fill three bottles with the lake water provided‚ trying to have as little duck weed as possible in them. 3) Put one of the bottles in the cold container‚ and one in the hot‚ leave the other at room temperature. 4) Using the testing equipment‚ measure the dissolved oxygen level
Premium Temperature Water Oxygen
EXPERIMENT 11: DETERMINATION OF DISSOLVED OXYGEN IN A WATER SAMPLE (WINKLER METHOD) INTRODUCTION In an alkaline solution‚ dissolved oxygen will oxidize manganese(II) to the trivalent state. 8OH-(aq) + 4Mn2+(aq) + 2H2O(l) －－＞ 4Mn(OH)3(s) The analysis is completed by titrating the iodine produced from potassium iodide by manganese(III) hydroxide. 2Mn(OH)3(s) + 2I-(aq) + 6 H+(aq) －－＞ 2Mn2+(aq) + I2(aq) + 6H2O(l) Sodium thiosulphate is used as the titrant. Success of the method is critically
Premium Oxygen Titration Water
Experiment IV Solubility of Dissolved Oxygen Purpose To demonstrate the effect of partial pressure‚ temperature and salinity on the solubility of dissolved oxygen and to demonstrate the interference of nitrite in dissolved oxygen analysis by the Winkler Method. To demonstrate the use of the oxygen electrode and the difference between activity and concentration. References 1. Mancy‚ K. H.‚ Jaffe‚ T.‚ "Analysis of Dissolved Oxygen in Natural and Waste Water‚" USDHEW Public Health Service
Premium Oxygen Water
Water Availability and Water Quality Water is the most precious natural resource that exists on our planet. Every living thing needs water in order to survive. If water becomes polluted‚ it loses its value and can become a threat to our health. Although we as humans recognize this fact‚ we disregard it by polluting our rivers‚ lakes‚ and oceans. Water availability has become a great concern in our world today. Out of all the available water on earth‚ only 3 % of it is fresh water. 77% of this
Premium Water
is a low water temperature a fish slows down and so do its metabolic activities and when water temperatures are high‚ fish speed up and their metabolic processes increase as well. Proteins and enzymes are also affected by temperature changes. Oxygen is essential for the production of ATP from nutrients in cells; consequently oxygen must be delivered to a cell in sufficient amounts. Within fish‚ the counter-current exchange system allows for the efficient extraction of oxygen from the water by the gills
Premium Metabolism Temperature