am trying to investigate the effect of the mass of magnesium dioxide used on the speed of the reaction of 2H2O2(aq) 2H2O(l) + O2(g). I hypothesize that the speed of the reaction is proportional to the rate of decomposition. Independent Variable The mass of MnO2 used Dependent Variable The rate of decomposition through the amount of mass lost Controlled Variables Environment of the experiment Stay in the same place to carry out the experiment and finish the experiment as fast as possible in case
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The great tragedy of what we know as World War two brought great danger to lots of people‚ but to not forget of what people themselves feared most‚ concentration camps. To be more specific in this case‚ the Auschwitz camps. In its time‚ it was the most effective camp of the Nazi regime. In this place‚ it consisted of three camps‚ each with their very own deadly purposes. The reasons this camp over all was the most effective was‚ history of its building‚ the day of a prisoner in the camps as well
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Chemistry Coursework Rates of Reaction Investigation Introduction In this investigation I am going to be investigating the reaction between marble chips and hydrochloric acid‚ and to see what differences in the rate of this reaction arise when different concentrations of acid are used. Below is the word equation for this reaction: Calcium Carbonate + Hydrochloric Acid = Calcium Chloride + Carbon Dioxide + Water Below is the fully balanced chemical equation for this reaction. CaCo3
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ADI Lab investigation: Photosynthesis Introduction and goals: In our experiment we worked with photosynthesis‚ which is the process of light energy‚ CO2 and H2O being turned into food for the plant. CO2+H2O+ Light energy=C6H12O+O2 is the formula for photosynthesis. Our group hypothesis was trying to determine weather o2‚ water‚ or the nutrients of the soil determine the mass of the water. The guided question was “Where does the mass that makes up a plant come from?” Methods:
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The concentration of wealth is why Western Europe never fully enveloped Marxism. In the East‚ Africa‚ and South America‚ they had wealth concentrated in the hands of a very few high classes‚ whereas in Western Europe and North America it was somewhat more spread out. In the "poor" areas‚ Marxism was seen as a way to take wealth from the elites and spread it among all the people‚ and Marxism was in most cases with the overthrow and execution of the elites. In the areas where
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the base. H+(aq) + OH-(aq) H2O(l) When a weak acid is neutralised some of the energy is needed to dissociate the molecules to make the hydrogen ions available for neutralisation. The result is a value for neutralisation enthalpy lower than - 57 kJ/mol (numerically lower‚ not more negative!) Note that as the weak acid is in equilibrium as the hydrogen ions are ’mopped up’ by the base the equilibrium shifts to the right hand side to make more until eventually all of the acid is able to react
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Cellular respiration and photosynthesis are fascinating‚ complicated‚ and important processes that are essential to life. Cellular respiration exists in animal and plants‚ whereas photosynthesis only exists in plants due to the chloroplast organelle. Cellular respiration starts with glucose‚ and oxygen and the photosynthesis process on the other hand starts off with the absorption of photons of light from the sun.While the end products of cellular respiration are carbon dioxide‚ water‚ and ATP‚ the
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Auschwitz was a concentration camp established in 1940 by the Nazis. The Nazis sent the Jews and other "undesirable" people here to be used as slaves or to be killed. It was located in Oswiecim‚ Poland. There was no privacy when the captives had to go to the washroom. Buckets and toilets were lined up in rows‚ and the toilets were often broken and flooded with urine and feces. Although the prisoners were exhausted due to hard work‚ sleeping was difficult because the bunks were made out of wood. The
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That is where hydrogen fuel cells come into the picture. Rather than depending on a foreign countries oil‚ to provide fuel‚ businesses today should look to hydrogen as an alternative fuel source. The United States is too dependent on foreign oil. If something were to happen‚ like another war with the Middle East‚ we would not have any oil to power our cars or heat our homes. That’s why hydrogen is the answer. Everybody could make their own fuel for their country by creating hydrogen plants and buying
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Analysis of Soda Ash and Carbonate-Bicarbonate Mixture Submitted: February 27‚ 2013 Department of Chemical Engineering‚ Faculty of Engineering University of Santo Tomas España‚ Manila Abstract A standard acid solution like HCl can be used as titrant for the analysis of both soda ash and a carbonate-bicarbonate mixture. In the analysis of soda ash‚ the volume needed to neutralize the soda ash is used to compute for its alkalinity‚ in this experiment we obtained a 17.6 % alkalinity with an error
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