47-51 of Bio 203L Lab Manual. Results/ Discussion: The effect of the chloride ion on its rate of diffusion in agar means it will diffuse faster because it is more concentrated. We graphed the diffusion of chloride ions rather than sodium ions because while the sodium ions do diffuse in to the agar the chloride ions from the NaCl will combine with silver ions‚ from AgNO3 and create a white precipitate. The white precipitate allows us to measure the the white band through the agar at different points
Free Ion Sodium chloride Diffusion
ion was dropped into the test solution containing the calcium ion‚ the calcium ion was no longer attracted to the water‚ but was instead attracted to the oxalate. This attraction resulted in a compound that is insoluble in water‚ a precipitate. The sodium and chloride ions are soluble in water‚ so they did not experience a change. In the Home 1 water sample‚ there were medium amounts of the calcium ion‚ medium to high amounts of the chloride ion‚ and a small amount of the sulfate ion. Comparatively
Free Ion Sodium chloride Sodium
theoretical yield of the product if 1.20 moles of aluminium and 2.40 moles of iodine are used. (Ans: 489.218 g) (b) Calculate the percentage yield of the product if 450 g of AlI3 is obtained. (Ans: 91.98%) 4. A salt solution is produced when 2.9 g of sodium chloride‚ NaCl dissolved in 200 ml of water. Calculate the molality (m) of the NaCl solution‚ given that the density of water is 1.00 g ml⁻1. (Ans: 0.25 m) [Apr 2013] 1 5. Carbon and hydrogen atoms make up a compound which yields 0.345 g of carbon
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Name ___________________________________________ Date ___________________________________ Block ____ Experiment 12A Investigating chemical equilibrium ABSTRACT 1. What is equilibrium and how can you tell it has been reached? __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________
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conditions of bleach’s stored at different temperatures. Introduction: Chlorine bleaches are made by dissolving chlorine in sodium hydroxide solution. They have a number of uses as they are used to remove colors‚ whiten or disinfectant via oxidation. Many bleaches have strong bactericidal properties‚ and are used for disinfecting and sterilizing as they contain chlorate ions. Sodium Thiosulphate is used in the pH testing of bleach substances as it neutralizes the color-removing effect of the bleach and
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for an example of Hess’s Law. (2pt) 2. If the accepted enthalpy change value for the dissolving of sodium hydroxide in water is −44.2 kilojoules per mole‚ determine the percent error of the experimental value that you calculated in Part I. Show your work. (experimental - actual value) / actual value × 100 % 3. If the accepted heat of reaction for the neutralization of hydrochloric acid with sodium hydroxide is −56.0 kilojoules per mole‚ determine the percent error of the experimental value that
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alternative method of subtraction to find the mass of the sodium chloride directly. Start with a mixture of sand (SiO2)‚ sodium chloride (NaCl)‚ and ammonium chloride (NH4Cl)‚ and use these separation processes: sublimation filtration evaporation First "sublimate" the ammonium chloride (NH4Cl); heat the mixture until the ammonium chloride (NH4Cl) passes into the gaseous phase. The remaining solid will be a mixture of the remaining two compounds‚ sodium chloride (NaCl) and sand (SiO2); these compounds
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nitrogen and halogens – elements that are most of the time the only ones involved in organic compounds. The experiment focused on the Sodium Fusion test‚ which tested for all elements except oxygen. In the test‚ the test compound is broken down into its elements‚ which then bond individually with sodium. The presence of sulfur was tested either with lead acetate or sodium nitroprusside. The presence of nitrogen was tested with ferrous ammonium sulfate and potassium fluoride. The presence of any halogen
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of the solution as soon as it starts to boil. 8) Repeat steps 3‚ 6 and 7 using distilled water. 9) Make observations. Expected results: the boiling point of the salt solution will be higher than the boiling point of the distilled water because sodium chloride is a non- volatile substance and an impurity when added to water. Therefore the substance does not change to vapour under normal heat conditions‚ because the bonds in the substances are stronger so a lot of heat must be applies and this will
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withers. Isotonic environments are preferred by most microbes for the most advantageous growth‚ although some live in slightly hypotonic solutions. (Alonzo‚ 2008) Growth in NaCl Solutions Samples of S. cerevisiae and S. epidermidis were placed into sodium chloride (NaCl) solutions of 1‚ 7 and 15 percent which were supplied in the lab kit. The S. cerevisiae results are as follows. After 24 hours of observation there was a moderate amount of growth in the 1% NaCl solution which had a cloudy overall
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