Rates of Reaction Coursework Aim: To find out how different concentrations of sodium thiosulphate (Na S2 O3) affects the speed of its reaction with Hydrochloric acid (HCL). Introduction When Sodium Thiosulphate and Hydrochloric acid react they produce a cloudy precipitate. Both of the chemicals are clear solutions and they react together to form a yellow precipitate of sulphur‚ the equation for this reaction is: Na2 S2 O3 + HCL‚ H2 O + NaCL + SO2 + S Sodium Thiosulphate + Hydrochloric
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Aim: To determine the effect of altering concentration (mol dm-3) of hydrochloric acid (HCl) on the rate of reaction (mol dm-3 s-1) for the following chemical reaction: CaCO3(s) + HCl(aq) CaCl2(s) + H2O(l) + CO2(g) Research question: How does altering concentration (mol dm-3) of hydrochloric acid (HCl) affect the rate of reaction (g/s) for the following reaction: CaCO3(s) + HCl(aq) CaCl2(s) + H2O(l) + CO2(g) Background information: The reaction between calcium carbonate and hydrochloric acid
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The Rate Of Photosynthesis: Lab report 1) Construct a graph of your data 2) Using the graph‚ estimate the time at which 50 percent of the leaf disks were floating on the surface. The point at which 50 percent of the leaf disks are floating will be you point of reference for future investigations Using the graph the estimated time that roughly 50% of the leaf disks were floating on the surface was around the 10th minute. At the 10th minute our number rose up to
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directly or indirectly shape their views‚ beliefs‚ and knowledge about the world in which they live. With a substantial rate of consumption as well as increased access to a wide range of news beyond more traditional sources‚ such as the radio and newspaper‚ there is a constant battle to uncover topics that will interest and attract a broad range of consumers. Among these topics is crime news‚ occupying at least 25 percent of all available news space (Sacco & Kennedy‚ 2011). After examining the concepts
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experiment is to determine the rate law and the activation energy for the reaction between persulfate ion‚ S2O82-‚ and iodide ion‚ I-: S2O82-(aq) + 2 I-(aq) 2 SO42-(aq) + I2(aq) The rate law can be written as Reaction rate = (1) Where m and n are the orders with respect to S2O82- and I-‚ respectively‚ and k is the rate constant. Determining the rate law involves determining the values of m and n. The temperature dependence of the rate constant is given by (2)
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for each company. Please show all numerical equations including numerator and denominator‚ not just a final number. Present your work in a comparative format using a table as illustrated: 1) Gross profit for 2008 PepsiCo Coca-Cola and Gross profit rate for 2008. 2) Percent change in operating income from 2007 to 2008. 3) Accounts receivable turnover for 2008. 4) Days sales in receivable for 2008. 5) Inventory turnover for 2008. 6) Days inventory on hand for 2008. 7) Increase (decrease)
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Response: How to Get a Real Education Scott Adams shares with us the ideal framework for an entrepreneurial curriculum. In his article How to Get a Real Education‚ he reinforces the fact that the whole is far greater than the sum of these parts‚ especially in the context of an entrepreneur. Adams tells us of a couple stories from when he was in college and how he used the skills of an entrepreneur to become successful. He saw opportunities‚ sometimes embedded within problems‚ and worked them to
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and her murder still free. One year after Susie’s death her sister and father begin to suspect of the neighbor and look for evidences to incriminate him. Susie fights to get justice and to see her family moving on after their lost. Personal response This is one of the most remarkable books I’ve read. Apart from the shocking beginning of the book‚ Susie telling her brutal murder‚ the rest is really emotional. The book makes an unacceptable tragedy‚ a family grief and the impossibility of justice
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American Obesity Rises The obesity rate in America has increased tremendously within the past 20 plus years. People have become more comfortable being heavier than the average. Society tries to enforce the idea of “slim” being “in”‚ while somehow contradicting itself by saying being comfortable in your own skin. The obesity rate in America has increased because of cultural changes‚ lifestyle habits‚ and genetics. Over the past 20 years‚ American culture has changed as a whole. Working men and
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Crime in Belize Analyse the current crime situation in Belize‚ draw your views on experience‚ perspective and observation. Support your report with additional research information. Review relating newspaper articles‚ education journals etc. to support your case. The Crime situation in Belize: Criminal activity of any nature has been on the increase in our country. With a population of approximately 312‚698 persons (Statistical Institute of belize‚ 2010) Belize has a total of 2‚766 crimes
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