manganese di oxide. The negative electrode is made of zinc. To do brush‚ we use tooth paste which is made because of chemistry. It contains sorbitol‚ water‚ hydrated silica‚ sodium lauryl sulphate‚ cellulose gum‚ flavor etc. So‚ toothpaste is all chemistry. When we go to bath‚ we use soaps. It consists of sodium palm kernelate‚ sodium palmate‚ sorbitol‚ glycerin etc. it is made because of chemistry only. Chemistry plays an important role in the discovery and understanding of materials contained in those
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Gerona‚ Evelyn Chemical Reactions Experiment No. 7 Date Performed: Feb. 17‚ 2014 Date Submitted: Feb. 24‚ 2014 Mrs. Vitancol I. Theoretical Framework A chemical reaction is a process that leads to the transformation of one set of chemical substances to another. Classically‚ chemical reactions encompass changes that only involve the positions of electrons in the forming and breaking of chemical bonds between atoms‚ with no change to the nuclei (no change to the elements present)‚ and can often
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distilled water to dissolve the sodium carbonate until 250 ml of solution were made. I had to calculate‚ from the information provided‚ how much sodium carbonate to use in the making of the solution. Using the volume and concentration of the solution‚ I was able to calculate the moles of the solution (concentration x volume). Using the periodic table I was able to calculate the molar mass of sodium carbonate which was 106‚ from this I could calculate the mass of the sodium carbonate I needed to make the
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Determination of the mole ratio of a chemical reaction The method of continuous variations is a means of determining the stoichiometric mole ratio of the reactants in a chemical reaction. The stoichiometric ratio‚ as given by the coefficients in the balanced chemical equation‚ represents the ratio at which chemicals must be combined to produce all product with no excess reactant. Since there is no “wasted” reactant‚ the maximum amount of product is made for the given amount of both reactants
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the trivalent state. 8OH-(aq) + 4Mn2+(aq) + 2H2O(l) －－＞ 4Mn(OH)3(s) The analysis is completed by titrating the iodine produced from potassium iodide by manganese(III) hydroxide. 2Mn(OH)3(s) + 2I-(aq) + 6 H+(aq) －－＞ 2Mn2+(aq) + I2(aq) + 6H2O(l) Sodium thiosulphate is used as the titrant. Success of the method is critically dependent upon the manner in which the sample is manipulated. At all stages‚ every method must be made to assure that oxygen is neither introduced to nor lost from the
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unknown Materials • Lab Quest • Lab Quest App • Temp. Probe • Two 10mL graduated cylinders • Two 25mL graduated cylinders • Two 50 mL graduated cylinders • Three 250mL beakers • 0.50 M sodium hypochlorite‚ NaOCI • 0.50 M sodium thiosulfate‚ Na S O • 0.2 M sodium hydroxide‚ NaOH • Styrofoam Cups Procedure Submitted as the carbon-less copy of the pre-lab outline (see attached) Results and Discussion During this experiment we first‚ prepared the solutions of the reactants
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outdoor pit over a fire of pimento wood‚ which gives the meat its distinctive flavor. Unfortunately‚ jerk contains high levels of salt and sodium. If a patient has health issues that include congestive heart failure or hypertension‚ they may need to be on a low sodium diet. A nurse can help with cultural repatterning by teaching the client how to reduce the salt or sodium in their diet‚ but at the same time maintaining their cultural food preferences. A nurse can provide recipes for jerk with less salt
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Reaction Rate Coursework Aim To see how the concentration of a reactant affects the rate of reaction‚ in this case sodium thiosulphate and acid. Scientific Background For a reaction to occur‚ the particles of the reactants must be colliding with each other with enough energy‚ the amount of energy needed for the reaction is called activation energy. Activation energy is altered by temperature‚ concentration‚ surface area of and the pressure on the reactants. Stirring the reactants also increases
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elements‚ while solid mixtures such as Fe filings and S powder were classified as heterogenous because after combining it their properties were still distinguishable from each other but when heated it is already considered as a solution. Water and Sodium Chloride were compounds given they are two or more elements‚ while mixing them we were able to create a solution. The Nacl that dissolves into H20 are techinically dissociated into ions but after heating it the table salt comes back without H20.
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likely cause of death. 4. If you suspected that a patient’s symptoms were caused by the condition suffered by Jennifer‚ Cassandra‚ and James‚ what kinds of test would you run to confirm your suspicions? - Tests should be run to see how much sodium is in the body‚ available for use. Electrolyte tests should give an idea of the concentration of salts. 5. Once you knew the cause of their symptoms‚ what kind of emergency treatment might you try for a patient like Cassandra or James if you were
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