SATURATION LINE OF WATER/STEAM INTRODUCTION When water is heated to steam‚ they are in thermal contact‚ are said to be saturated. The water is called saturated because it cannot absorb more energy without changing into steam‚ and the steam is called saturated vapor because it cannot absorb any more energy unless temperature increase and it becomes superheated. AIM: The aim of this laboratory is to find a mathematical model for the saturation curve for water/steam. APPARATUS The apparatus
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The aim of this experiment was to show the water potentials of young‚ old and damaged potatoes and different sucrose concentrations (0.15‚ 0.20‚ 0.25‚ 0.30‚ 0.35 and 0.50). It was expected that the potatoes would lose weight as the potatoes would have lower water potential when placed in a solution ‚ and in this can be taken from the theory of osmosis which states that “the passive diffusion of water molecules across a selectively permeable membrane down a concentration gradient” (Taylor and Bruenn
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Saturation of landfill In the densely populated city of Hong Kong‚ where land resources are rare‚ waste is a troublesome issue. According to the Hong Kong Environmental Protection Department(EDP) Hong Kong is running out of landfill space far earlier than expected‚ and the existing landfills will be filled up‚ one by one‚ in mid to late 2010s if waste levels continue to increase at current levels.) Unless solutions are identified immediately‚ we could face a crisis in the next decade of having
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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
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Name‚ Date‚ Hour Lesson Objective: Key Vocabulary: Lesson pH and dilutions Science Starter: Determine the pH of .0103M H3PO4 solution in water. Remember to look at the H+ count. Box 1 In a dilution‚ the number of solute particles does not change‚ just the concentration with respect to the volume. This relationship is _____________________ proportional. Initially‚ there is 275mL 0.125M stock solution of a substance. -Determine the amount of moles of solute present. -What is the concentration
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BIOLOGY OSMOSIS LAB REPORT 1. Research Question/ Aim How do the different sodium chloride concentrations of solutions affect the length (measured in mm) and mass (measured in grams) of potato cores placed in them overnight (approximately 10 hours)? 2. Hypothesis Alternative hypothesis: As the concentration of sodium chloride in the solution increases‚ the mass of the potato cores will decrease. If the solution they are in has a lower water potential than the potato cores‚ there will be
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Abstract The experiment was carried out to investigate at which point the potato has reached its isotonic environment. From the results‚ when the concentration increase to 0.3M‚ the mass of the potato slices decreased by -3.26%. We can conclude we see that as we increased the sucrose concentration it was a decrease in the percent change. Introduction All cells have membranes that are selectively permeable. In other words‚ they allow certain things in and certain substances are not allowed to
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adequate oxygen and nutrients. While oxygenation is provided in the incubator‚ the health care team must maintain oxygen within a fine range‚ as the retinas appear to be very sensitive to the amount of oxygen supplied. In the NICU‚ the nurse provided me with a chart for ROP guidelines – Red‚ yellow‚ and green – which was dictated by the premature infant’s gestation. Depending on where the infant placed on the chart‚ nursing interventions were given‚ including the preferred range of oxygen saturation
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100 180 100 100 100 Modifications The results from my preliminary experiment show that 100 cm3 of oxygen has been produced in the first 30 seconds.. This reaction is far too quick and will prevent me from analysing the effects different substrate concentrations have on enzymes if I decide to continue. I will therefore lower my yeast concentration to 1%. I will also measure the volume of oxygen produced every 15 seconds‚ instead of every 30 seconds. This will make my results more reliable and allow
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Chemistry Unit 2 Area of Study: 1: Water Chapter 11: Measuring solubility Measuring Solubility Solubility: the maximum amount of that substance that can be dissolved in a that temperature Saturated solution: a solution which no more solute can be dissolved at that temperature Measuring solubility Determine the maximum mass of solute that can be dissolved in 100 grams of solvent at a particular temperature Worked Example A maximum of a 6g of solute can be dissolved in 20g of water at 20ºC
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