Sodium thiosulfate

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    Equipment: // Sodium thiosulfate solution (of concentrations 0.1M, 0.2M, 0.3M, 0.4M). // Hydrochloric acid (2M). // 100cm3 conical flask. // 10cm3 measuring cylinder. // Dropping pipette. // Small piece of plain paper with a large X drawn with think black pen. // Stopwatch. // Goggles. Variables: Independent - The concentration of sodium thiosulfate solution (0.1M, 0.2M, 0.3M, 0.4M). Dependent - The time taken for the cross to not be seen. Control - // Concentration and volume hydrochloric acid/ volume of sodium thiosulfate solution - to ensure that the rate of reaction is only being altered by the concentration of the sodium thiosulfate solution. // Temperature of the solution - As temperature is another factor that increases the rate of…

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    Hello I am Marcus Gonzalez a chemistry student at Texas State University and my lab partner, Colten and I where instructed to see if the combination and specific concentrations of sodium thiosulfate plus sodium hypochlorite are able to produce second degree burns on a person within 10 seconds. In order for a second degree burn to be possible we must reach a temperature of at least 56°C (133°F) in order to create burns up to third degree for the time the chemical stayed on the worker. Now the…

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    A similar experiment such as the reaction of Sodium Thiosulfate and Hydrochloric Acid includes the “Yellow Snowstorm” reaction – a reaction between Copper (II) and Thiosulfate. Copper (II) sulfate [CuSO4·5H2O] dissolves to give cupric ion (Cu2+); in the context of a redox reaction with thiosulfate, the cupric ion acts as an oxidizing agent. Reactions within the temperature on Sodium Thiosulfate and Hydrochloric Acid occur as the result of molecules interacting with each other to create new…

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    The above Time Vs. Temperature graph displays the results of an experiment measuring the time taken for a sodium thiosulphate solution, at a certain temperature, to react with Hydrochloric acid. The descending curve in the above graphs suggests that the higher the temperature of the sodium thiosulfate solution the faster the reaction, causing the cluster of data later on in the graph. This is due to the high temperatures causing the increase in the particles average kinetic energy, the more…

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    Research Question How does the change in hydrochloric acid concentration affect the rate of reaction between sodium thiosulfate (Na2S2O3(aq)) and hydrochloric acid (HCL(aq))? Background to the Research question Collision Theory Back in 1916, scientists William Lewis and Max Trautz proposed the collision theory, which qualitatively explains how chemical reactions take place and why reaction rates change for various reactions. Chemical reactions involve collisions amongst reactant particles or…

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    The mixture in 2 was titrated against sodium thiosulfate placed in a 50.00 mL burette. 4. Steps 1-4 was repeated untill a difference of 0.01 mL is noticed in values taken. 2.0 LITERATURE REVIEW Experiment 1: Titration is a common laboratory method of quantitative chemical analysis that is used to determine the unknown concentration of an identified analyte. IN our case, it is an acid-base titration. In the titration the titrant(solution with a known concentration of reagent) is added to the…

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    Lipase Lab Report

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    Contents Introduction 2 Aim 3 Hypothesis 3 Materials List 3 Safety Considerations 4 Hotplates 4 Potential Health Effects: 4 First Aid Measures: 4 Lipase Solution 4 Potential Health Effects: 4 First Aid Measures: 4 Sodium Carbonate 5 Potential Health Effects: 5 First Aid Measures: 5 Phenolphthalein 6 Potential Health Effects: 6 First Aid Measures: 6 Full Cream Milk 6 Test Tubes, Glass Rods and Measuring Beakers 7 Method 7 Results 8 Discussion 9 Conclusion 10 Appendix 10 Calculations: 13…

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    that demonstrated how renal system responses and reacts when subjects consuming different types of fluids. Respective fluid volumes are based on each subject’s body mass. Based on each subject’s body mass, after converted from pounds to kilograms, every subjects has different volume and fluids for ingestion. For the control subject, she ingested no fluid throughout entire lab which represented the conditions of normal fluid. For the hypotonic subjects, she ingested 854mL of water within 10…

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    liquid form. This is a physical change because its actual material that it consisted didn’t change, meaning, it’s still sugar, but in liquid form. Mixing solid copper sulphate with water is a physical change because a new substance was never formed and the copper sulphate is still copper sulphate, but in a different state. Plus the fact that the final product turned into a mixture (solution), which is another sign of a physical change. The changes I examined that were chemical in my experiment…

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    Calcification Lab

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    “With increasing degree of calcification, the concentration of NaOH increases. The relationship between the concentration of NaOH and the factors in the calcified red mud liquor is given by three Equations (16–18): N_NaOH=1.29(N_1 m_1-N_2 (m_2-N_NaOH/1.29) (16) m2 = m1+m1N3 (17) r = 1000/m2 …

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