materials needed for experiment which included: a. Small test tube with lip b. Large beaker c. Small graduated cylinder d. Large graduated cylinder e. One 9in balloon f. Citric acid g. Sodium bicarbonate h. Sodium chloride 2. To start the experiment: * Na2CO3(aq) + CaCl2. 2H2O(aq) à CaCO3(s) + 2NaCl(aq) + 2H2O * Put on your goggles. * Weigh out 1.0 g of CaCl2·2H2O and put it into the 100-mL beaker. Add 25 mL of distilled water
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Name: Exp 9: Stoichiometry of a Precipitation Reaction Data Tables: Step 3: Show the calculation of the needed amount of Na2CO3 CaCl2.H2O(aq)= m/M =1/147 =0.0068 mol CaCO3(s)=0.0068*1/1 =0.0068 mol CaCO3 (s)= CaCO3 mol *CaCO3 g =0.0068 mol*100.01 g =0.68 g Convert moles of Na-2CO3 to grams of Na2CO3 = 0.00680 moles Na-2CO3 x 105.99g Na-2CO3 1 mole Na-2CO3 = 0.72g 0.72g of Na-2CO3 to fully react with 1g of CaCl2-.2H2O Step 4: Mass of weighing dish
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different compounds. A compound is a chemical substance that consists of two or more different chemically bonded elements. In this experiment‚ several different compounds are being worked with – potassium iodide‚ lead (II) nitrate‚ acetic acid and sodium bicarbonate. The purpose of this experiment is to determine whether or not a reaction has taken place using qualitative and quantitative analysis. Procedure Part 1 - Qualitative observations of both potassium iodide and lead (II) nitrate were recorded
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Data Tables: Part 1: Chemicals Well No. Observations of the Reaction A. NaHCO3 + HCl 1A Bubbles appeared for 5 seconds. Now clear in color‚ no bubbles B. HCl + BTB 2A Turned from clear to yellow C. NH3 + BTB 3A Turned from clear to dark blue D. HCl + blue dye 4A Turned from clear to green E. Blue dye + NaOCl 5A Turned from blue to light blue with the 1 drop of HCl 6A Turned from blue->light blue->yellow->light yellow->clear‚ transparent F. NaOCl + KI 7A Turned from clear to Light yellow
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hypothalamus‚ the osmoreceptor cells of which sense the internal environment -the hormone‚ antidiuretic hormone (ADH)‚ which controls the amount of fluid leaving the body in the urine -The hormone aldosterone‚ which determines the reabsorption of both sodium ions and water from the kidney tubules -The hormone atrial natriuretic peptide (ANP) is a hormone synthesized and released by the myocardial cells in the atrium of the heart. -Filtration and osmosis -Water moves between the vascular compartment
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major electrolytes that are in our body are as follows: sodium (Na+)‚ potassium (K+)‚ chloride (Cl-)‚ calcium (Ca2+)‚ magnesium (Mg2+)‚ bicarbonate (HCO3-)‚ phosphate (PO42-)‚ sulfate (SO42-). Sodium is an abundant metallic element which is an important mineral for all living organisms. It is also widely used industrially to make an assortment of consumer goods. In a pure form‚ sodium is a soft‚ silvery gray‚ highly reactive metal. Pure sodium is usually stored in a nonreactive substance‚ as it oxidizes
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Modern methods of food production have altered radically from processes used in the past. Many food producing companies have invented their own improved techniques of cooking. Most of these procedures contain numerous different forms of chemical additives and one of the newest chemical substances that will enhance food flavor is monosodium glutamate (MSG). Even though it has no taste of its own‚ it intensifies considerably the taste of a wide variety of food as well as revealing flavors that could
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A1 NaHCO3 SodiumBicarbonate HCl Hydrochloric Acid Bubbles yes A2 NaOCl Sodium-Hypochlrite Kl Potassium Iodide Observation 1: None Add 2 drops of solution Observation 2: Solution turned blue Yes A3 Kl Potassium Iodide Pb(NO3)2 Lead Nitrate Turned Yellow Yes A4 NaOH Sodium Hydroxide C20H14O4 Phenolphthalein Turned pinkish red (magenta) Yes A5 HCl Sodium Hydroxide C20 H14 O4 Phenolphthalein Turned Cloudy Yes A6 NaOH Sodium Hydroxide AhNO3 Silver Nitrate Turned Brown Yes B1 AgNO3 Silver Nitrate
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silicates in the glass are attacked by the HF(aq). Sodium silicate(Na2SiO3)‚ for example reacts as follows: 1 Na2SiO3(s) + 8 HF(aq) H2SiF6(aq) + 2NaF(aq) + 3H2O(l) a. How many moles of HF are needed to react with 0.300 mol Na2SiO3? b. How many grams of NaF form when 0.500 mol of HF reacts with excess sodium silicate? c. How many grams sodium silicate can react with 0.800 g of HF? 4. Automotive air bags inflate when sodium azide‚ NaN3‚ rapidly decomposes to its component
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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. Within a fluid compartment
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