Whereas magnesium‚ needs to be determined using the standard addition method. The concentrations of each respective molecule can be presented as CaO and MgO percentages of the unknown limestone sample. Materials and Methods The compound calcium carbonate (CaCO3‚ CAS: 471-34-1‚ 204.89ppm) was utilized to compare its absorbance to the unknown sample of limestone # 8066 on the standard curve. Moreover‚ magnesium sulfate heptahydrate (MgSO4*7H2O‚ CAS: 10034-99-8‚ 40.8ppm) was also utilized to compare
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able to pass all of them. I recommend using sodium carbonate as your substance. Of all the substances‚ only two were covalent and two were ionic. The ionic substances‚ sodium chloride‚ sodium carbonate‚ and salicylic acid‚ came close to the description you requested. The covalent substances‚ sucrose and salicylic acid‚ did not match the descriptions. The best substance would definitely be sodium carbonate‚ since it passed all the tests. Sodium carbonate had a high melting point‚ so it will be able
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Presence of Insecticides & Pesticides in Fruits & Vegetables SCHOOL : K .V N T P C CHEMISTRY PROJECT REPORT STUDY THE PRESENCE OF INSECTICIDES AND PESTICIDES IB FRUITS AND VEGETABLES Name : Class : Reg. No : Examiner Teacher-in charge. CERTIFICATE This is to certify that the project was done by …………………………… Reg. No ……………….. Is in partial fulfillment of Chemistry Practical Examinations
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major minerals and include sodium‚ potassium‚ chloride‚ calcium‚ phosphorus and sulfur. Microminerals or trace elements are needed in smaller quantities and include iron‚ copper‚ zinc‚ selenium and iodine amongst others. Although trace elements are needed in smaller amounts‚ they are just as essential to health as major minerals. Minerals are essential to various functions in the body. Sodium‚ potassium and chloride are all necessary for fluid balance. Magnesium‚ sodium‚ calcium and potassium are
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E.) Lead (II) Nitrate and Potassium Iodide‚ my hypothesis a Double displacement. F.) Copper and oxygen‚ my hypothesis is a synthesis. G Magnesium and oxygen‚ my hypothesis is a synthesis. H.) Acetic acid and Sodium bicarbonate‚ my hypothesis is a double displacement. I.) Copper (II) carbonate and Hydrochloric acid‚ my hypothesis is a double displacement. Data: Attached. Conclusion: Experiment A. Aluminum and Copper (II) Chloride. In this experiment I filled a large test tube with one dropper
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30% c. Plasma 8% 5. Give an example of each of the following solutes: a. Ions/electrolytes Sodium b. Colloids Proteins c. Nonelectrolytes Glucose 6. List the major extracellular and intracellular cations and anions a. Extracellular cations: Sodium‚ Potassium‚ Calcium and Magnesium anions: Bicarbonate‚ Sulfate‚ Protein‚ Organic acids‚ Phosphates‚ and Chloride b. Intracellular cations: Sodium‚ Potassium and Magnesium anions: Bicarbonate‚ Sulfate‚ Protein‚ Phosphates and Chloride 7.
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water pollution. Identify A & B. 6. An organic compound P with molecular formula C2H6Ois an active ingredient of all alcoholic drinks. It is also used in medicines such as tincture iodine‚ cough syrups. Identify `P`. Drop a small piece of sodium into the test tube containing `P`.A new compound `Q` is
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observed. When I added HCl to the Mg‚ I observed it fizz‚ turn to gas‚ and get really hot. Another example is when I added heat to the Cu(NO3)2 it dissolved‚ turned green and started turning into gas. D - Classify the following properties of sodium metal as physical or chemical: Silver metallic color – physical Turns gray in air – chemical Melts at 98oC – physical Reacts explosively with chlorine - chemical E - Classify the following changes as physical or chemical: Water freezes
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Michelle Fishman Period 11 TCA #3 TITLE: Egg Shell Lab OBJECTIVE: To determine and compare the amount of calcium carbonate content of brown and white eggshells. MATERIALS: white and brown eggshells‚ water‚ deionized water‚ beaker‚ pipet‚ flask‚ test tube brush‚ funnel‚ hotplate‚ mortar‚ pestle‚ ethanol‚ HCl‚ phenolphthalein indicator‚ sodium hydroxide PROCEDURE: (Complete for both white and brown eggshells) 1. Get one egg and beaker and bring it to your lab station. 2. Break the egg into
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Redox Titration Analysis of a Commercial Bleach A. Purpose ! ! ! To review oxidation-reduction reactions and their stoichiometry. To learn the concept and technique of redox titration. To determine the percent (m/v) of an active ingredient‚ sodium hypochlorite (NaOCl)‚ in a commercial bleaching agent. B. Theoretical Background Whereas acid-base reactions involve the transfer of a proton‚ oxidation-reduction or redox reactions involve the transfer of electrons from one substance to another
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