we have found out about the role of positive and negative charges that are useful in order to conduct energy. Simultaneously‚ we have also found out that saltwater conducts energy because of the solid salt it contains and when it is dissolved into water‚ the elements sodium and chloride from the salt separate or break up because of the very reactive traits of water (H2O)‚ thus‚ causing the production of positive and negative ions that are able to carry energy and consequently conducting electricity
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The primary focus of experiment 4 was to teach a student the basic solubility rules of salts in aqueous solutions. After developing and using a scheme for the qualitative analysis of three cations in an aqueous mixture‚ a student would use a centrifuge to identify‚ precipitate‚ and separate the three ions in the mixture. After becoming familiar with all three cations‚ the student would use the scheme again to identify at least two of the cations in an unknown solution. In order to begin the separation
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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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WHAT IS JUNK FOOD ? The term “junk food” is used to describe food that is low in nutritional value‚ with a comparatively high caloric value. Many people try to avoid or limit such food in their diets‚ out of concerns that it is not healthy‚ despite the fact that numerous food manufacturers produce a range of products which could be considered junk. Nutritionists‚ doctors‚ and other health advocates often work to educate people about junk food‚ encouraging them to eat well balanced diets which contain
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history (USHMC 1). Auschwitz was miserable from start to finish. About 1.1 million prisoners were killed‚ only 90% were Jews (USHMC 2). This is what went on in Auschwitz from when the prisoners entered to when the prisoners left. Auschwitz Concentration Camp was opened in 1940 (ABEC 15). This camp was located in Poland (USHMC 26). As you entered this camp a sign that stated “Work Will Set You Free” was up to deceive the prisoners (ABEC 18). The prisoners thought if they worked‚ they would be set
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Salt: A World History by Mark Kurlansky The following passage has been transcribed for academic purposes only‚ and is aimed at teaching reading comprehension skills necessary to perform well on the FCAT. Please read the following passages‚ and answer the questions that follow in the packet. Please take as much time as is necessary to read‚ understand‚ and adequately answer the accompanying questions. Questions will be graded on the basis of correctness‚ response quality‚ and appropriateness
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– Separating Sand & Salt Purpose: The purpose of this experiment is to separate a mixture of sand and salt. Materials: Small beaker Electric balance Sand Salt Water Graduated cylinder Stirring rod Filter paper Flask Rubber policeman Wash bottle Funnel Bunsen burner complete with rubber tubing and a source of gas Hot hands Insulator pad Ring stand complete with a ring Wire gauze Striker Pre-lab Questions: 1. Water will be useful in separating the salt and sand because salt is soluble in water‚
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nor did they care that hundreds of people were dying around them. The Dachau concentration camp was full of deadly experiments‚ cold-hearted people‚ and high percentages of death. Dachau Prisoners Dachau imprisoned a lot of people and some of them weren’t a part of any religion. Dachau was made by Heinrich Himmler‚ and was made to train German soldiers‚ but Jews were soon made prisoners there. The Dachau concentration camp started to take people in since 1933. Mostly people who were religious were
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Sodium chloride is table salt that is commonly used in the food industries as a flavor enhancer and preservative society. Sodium chloride is also used in glass production in society. Salt helps lower the melting points of ice or snow‚ therefore they are used in cold climates to help get rid of accumulating snow or ice. Sodium chloride is normally made by
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Subject: Chemistry SL Title: Preparation of a salt (lead iodide) by using precipitation method. Aim: To produce 1.50 g of lead iodide‚ PbI2‚ assuming 100 % conversion‚ using 1.00 g solid potassium iodide‚ KI‚ and 0.1 M lead nitrate‚ Pb(NO3)2 solution of volume 30 cm3 and hence calculate percentage yield. Calculations: 2KI(s) + Pb(NO3)2( aq) —> PbI2 (s) + 2KNO3 (aq) Mass of PbI2 to be produced = 1.5 g Moles of PbI2 = = 0.003 Moles of KI = 0.003*2 = 0.006 Mass of KI = 0.006*166 = 1.00 g
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