The aim of this experiment was to calculate the concentration of an unknown solution of Sodium Hydroxide (NaOH) by titrating it with Hydrochloric Acid (HCl) and to identify any possible sources of error. A colour change from pink to yellow signified the end of each individual titre as the NaOH had been neutralised. Experimental: Method: Firstly two solutions were prepared to show the colour of the Phenol Red indicator in acid and alkaline conditions. These colours were then used to determine the
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prompting many societies to resolve it. An enduring issue that can be taken note of is cultural diffusion. Cultural diffusion depicts the spread of cultural practices‚ ideas‚ beliefs‚ and innovations‚ often through trade and migration. From medieval times up until now‚ this matter has left a great mark on society. The impact of cultural diffusion is an issue that has affected many people. Cultural diffusion has impacted people and societies around the world. The silk road facilitated the exchange of
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potential to improve the • What is health information technology? • Quality and health information technology • Current status of health information technology • Efforts to encourage faster diffusion quality‚ safety‚ and efficiency of health care. Diffusion of IT in health care is generally low (varying‚ however‚ with the application and setting) but surveys indicate that providers plan to increase their investments. Drivers of investment in IT include the promise
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The mechanism of heart contraction and relaxation (mechanical restitution) is the basic of cardiac functioning. This mechanical restitution is driven by calcium movement and concentrations. An increase in cystolic calcium concentration causes contraction in myocardium. Calcium from the extracellular fluid enters the cardiomyocyte through the L-type Ca2+ channels after being propagated by the cardiac action potential which depolarises the cell. This flood of calcium triggers more calcium release
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Osmosis investigation Aim: To investigate how sugar concentration affects the mass or size of a potato and find out the sugar solution. Introduction: Osmosis is the movement of water molecules across a partially permeable membrane form a region of high water concentration to a region of low water concentration until the concentration on both sides is equal. This means that osmosis is like diffusion involving water molecules. Osmosis occurs across a partially permeable membrane‚ with holes
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In conclusion‚ the concentrations and absorbance of the Kool-Aid solution were found. The purpose of the experiment was to develop a deeper understanding of the effect that concentration has on the absorbance of light–which the objective was met. To add‚ another goal of the experiment was to determine the unknown solution’s concentration using the absorbance data recorded. This was concluded to be 0.25 M–most similar to Solution #1. Concentration‚ measured in molarity (M)‚ can be calculated using
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5-dinitrobenzoic acid to oxidize the aldehyde group on the carbohydrate‚ the reducing end of glucose increases in absorbance of 540 nm. Using a UV spectrophotometer‚ the concentration was calculated by using a regression line of the standard curve. The experimental data concluded a 1068.912 µg/ml. With the actual concentration being 1200.000 µg/ml‚ a 10.924% error was deduced. Though the error is slightly high‚ the deviation of 134.370 µg/ml makes up for some of the error through this process;
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Introduction A group of people wrote in response to a statement about marijuana use. The statement was about a young adult who uses marijuana. He/She said that when under the influence of marijuana‚ that he/she has and uncanny amount of concentration. He/She is able to perform home maintenance‚ schoolwork‚ and yoga stretching with an overall better performance than when he/she is sober‚ or not "high". In reading this selection I realized that many others‚ including myself‚ have better performance
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Spanish essay Hispanics to Americans Cultural diffusion By: Emma Stone “Hello my name is Pablo” said one boy Or better put “Hola me llamo Pablo” Hispanic culture is everywhere and so is their culture‚ music‚ dance‚ food‚ languages‚ and art. If you take the Hispanics out of America you are also taking out very famous artists and actors such as George Clooney‚ Shakira‚ and Jennifer Lopez. But the entire Hispanic culture is not just made up of famous
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Group 4 Internal Assessment Partners: Bhavya and Katherine Research question: Does the concentration (mol dm3) of sulphur dioxide in wine rise or fall when exposed to air for different time periods (0‚ 75‚150‚225‚ 300 minutes)? Purpose: Many adults enjoy the consumption of wine but are not aware of the different preservatives and chemicals that are added to the drink. Sulphur Dioxide‚ which is added to many food products including wine because it acts as a reductant‚ is ‘well known as a poisonous
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