all 3 weeks‚ the calorimeter oval bucket (#13) was filled up with roughly 2.000 kg of DI water. The temperature of the water was roughly around room temperature (depending how long it was sitting in the room). The bucket was then placed in the calorimeter in a certain way. At the bottom of the bucket‚ there were 3 “dents” which were aligned with the dents at the bottom of the calorimeter jacket (#14). The oxygen combustion bomb (#15) was then opened and roughly 10 cm of the wire (metal wire provided
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The Physical properties of water: 1. Knowledge of the physical properties of water: Water is the most abundant compound on Earth ’s surface‚ covering about 70 percent of the planet. In nature‚ water exists in liquid‚ solid‚ and gaseous states. It is a dynamic equilibrium between solid and gas states at standard temperature and pressure. At room temperature it is tasteless and odourless‚ nearly colourless with a hint of blue. Many substances dissolve in water and is commonly called a universal
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oven • Nutrient Agar powder • Potato Dextrose Agar powder • Soluble starch • Weighing scales • Shaker • Spectrophotometer or colorimeter • Water bath (Temperature controlled) Materials per group of 4 students • Hand trowel or disposable spoons • Sterile pipettes (One each of 10 mL‚ 5 mL and 1 mL) • Pipette pumps • Six bottles of sterile water‚ containing 90 mL each • Sterile Glass Petri dishes or Pre-sterilized
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molecule of water A chemist’s view of the world is not as narrow as one might think! Yes‚ we start with the atom‚ and then go on to the rules governing the kinds of structural units that can be made from them. We are taught early on to predict the properties of bulk matter from these geometric arrangements. And then we come to H2O‚ and are shocked to find that many of these predictions are way off‚ and that water (and by implication‚ life itself) should not even exist on our planet! But we soon
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to tell about WATER water is the most imp thing on earth.without water no life.We take it for granted‚ we waste it‚ and we even pay too much to drink it from little plastic bottles. And still‚ today‚ nearly 1 billion people in the developing world don’t have access to it. Clean‚ safe drinking water is scarce. It is the foundation of life‚ a basic human need. Yet today‚ all around the world‚ far too many people spend their entire day searching for it. Simply put‚ water scarcity is either
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Properties of Water Introduction: Water’s chemical description is H2O. As the diagram to the left shows‚ that is one atom of oxygen bound to two atoms of hydrogen. The hydrogen atoms are "attached" to one side of the oxygen atom‚ resulting in a water molecule having a positive charge on the side where the hydrogen atoms are and a negative charge on the other side‚ where the oxygen atom is. This uneven distribution of charge is called polarity. Since opposite electrical charges attract‚ water molecules
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needs water to survive. Water is our most important resource that is required to ensure our survival. This resource is something that we use every day in our lives and it serves many different purposes. We use water to take showers‚ to flush the toilet‚ cook dinner‚ to drink‚ and to clean. Water is not only used for our domestic needs‚ or wants but it is used in agriculture‚ industries‚ transportation‚ and as an alternative energy source (Lenntech‚ 2008). Life would be impossible without water. All
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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
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Laboratory 2: Measurement of Biochemical Oxygen Demand (BOD) Objective To determine the amount of oxygen necessary for biological oxidation of wastewater effluent and determine the amount of oxygen required by bacteria while stabilizing decomposable organic matter. Methodology Apparatus ; Biochemical Oxygen Demand (BOD) meter‚ Dissolved Oxygen bottle (DO bottle)‚ pipette‚ Teflon tape‚ dilution water‚ incubator machine. Procedure; Add 300 ml dilute water then take DO reading immediately Closed
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Solar water disinfection Solar water disinfection is a type of water purification system that uses solar energy in order to make contaminated water safe to drink. This is done by eliminating contagious biological organisms such as bacteria‚ viruses‚ protozoa and worms. This process can only be taken place on biological agents non-biological agents such as toxic chemicals or heavy metals disinfection may not make all kinds of water safe to drink. Therefore additional steps away from disinfection
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