to determine the identity of two unknown elements. Hypothesis If the color of one of the unknown elements is the same as one of the known elements‚ then they are the same element. Materials * Samples of the following metallic salts * calcium chloride * copper chloride * iron chloride * lithium chloride * potassium chloride * sodium chloride * strontium chloride * unknown 1 * unknown 2 * Bunsen burner and accessories * Safety goggles * Lab apron
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Effects of Electrical Stimuli and Injected Reagents on Frog Hearts Melissa Higdon Section 05‚ Group 01 November 19‚ 2013 Introduction: The heart is a very complex muscle for all species. It is responsible for sending oxygenated blood throughout the body as well as sending deoxygenated blood to the lungs‚ and continuously circulate this way for as long as we are alive. Many things can be effected‚ for example how fast the heart beats or how much
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that shows colors of different spectrums hydrogen for example shows 4 colors …etc Materials: 1- Benson burner 2- A wire loop ( wake sure it ’s clean ) 3- 4 filter papers 4- 4 Unknown test solid as directed by instructor (potassium ‚ sodium ‚ calcium ‚ barium / chloride ) 5- A beaker 6- diluted HCL ( to clean the wire loop with it ) 7- A spatula
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molecules‚ keeping it from freezing. *MATERIALS: *Power Macintosh or Windows PC *10-ml graduated cylinder *Vernier computer interface *ice *LoggerPro *salt *Vernier Temperature Probe *stirring rod *ring stand *100 ml of 1M calcium chloride *utility clamp *100 ml of 1M magnesium chloride *one test tube *100 ml of 1M sodium chloride *600-ml beaker *100 ml of 1M potassium chloride *water *100 ml
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you observe it‚ only one phase is visible. (1 mark lost) 43. Sodium Carbonate will be very soluble in water because of the positive ions of sodium attached to the negative ions of the carbonate. Methanol will be partly soluble in water due to it’s small size and the presence of the OH group in the molecule and it’s very polar nature. Gasoline (Octane)‚ is completely insoluble since it is non-polar.
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The Effect of Chemicals on Fire In this lab we got to see the effect of chemicals on fire. We got to. See the flames change to different colors. The size of the colorful flame depended on how the Bunsen burner was turned on. I was sick when we were supposed to have the lab read‚ but I got it read the next day before class. During the lab I made sure to have the correct attired on: my goggles and apron. Ow ill go ahead and tell you five good safety precaution tips. One‚ never leave a lit
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Baking Soda (NaHCO3) Lab (Stoichiometry) - Physical Science Name: __________________________________________________ Purposes: 1. Calculate theoretical mass of NaCl based on a known mass of NaHCO3. 2. Experimentally determine the actual mass of NaCl produced. 3. Calculate the percent yield for your experiment. Reaction Equation: NaHCO3(s) + HCl(aq) ( NaCl(s) + CO2(g) + H2O(l) Materials: safety glasses baking soda (NaHCO3) 1 M HCl and
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Separating a Mixture of Compounds Exp. No. 2 name Chemistry 145 February 2‚ 2014 I. Purpose The purpose of this experiment was to separate this mixture into components‚ determine the mass and percentage of each component. In addition to test the accuracy of an alternative method of subtraction to find the mass of the sodium chloride directly. Start with a mixture of sand (SiO2)‚ sodium chloride (NaCl)‚ and ammonium chloride (NH4Cl)‚ and use these separation processes: sublimation filtration
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chemicals by color of flame. Certain elements will burn certain colors which will help us to figure out which element it is. Materials: Safety goggles Matches Weighing dishes‚ 6 Watch Glasses‚ 6 Wooden Splints‚ 6 Water‚ 250 mL Alcohol‚ 5 mL Calcium Chloride Copper Chloride Lithium Chloride Potassium Chloride Sodium Chloride Strontium Chloride Procedure: 1. Put on safety goggles 2. Wear gloves when handling chemicals 3. Obtain a 250 – mL beaker half-full with water. Obtain 6
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Muscle and Nerve Preparation Preparation of Ringer ’s solution Dissolve 6.5 g of sodium chloride (NaCl)‚ 0.14 g of potassium chloride (KCl)‚ and 0.20 g of sodium bicarbonate (NaHCO3) in 800 mL of distilled water. Also‚ dissolve 0.16 g of hydrated calcium chloride (CaCl2.2H2O) and 0.39 g of hydrated magnesium sulfate (MgSO4.7H2O) in 100 mL of distilled water. Add the 100 mL cautiously to the 800 mL‚ stirring vigorously. Then make the final volume equal to 1 liter by adding more distilled water and
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