salts of carbonic acid 4/2/14 A summary of the concepts: The purpose of this lab is to better understand “stoichiometry”. We will be reacting sodium carbonate (NaHCO)3 and sodium carbonate (Na2CO3) with hydrochloric acid to produce sodium chloride‚ water‚ and carbon dioxide. The balanced chemical reaction looks like this: NaHCO3 + HCl = NaCl + H2O + CO2 CAUTION: Be especially careful when handling the 6M HCl (aq)‚ as it can cause chemical burns to the skin. If any acid spills on you‚ rinse
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Determining the composition of pennies with redox reactions Introduction: The understanding of oxidation and reduction must be clear to carry out this lab. With the understanding of these concepts we can calculate or hypothesize for the properties of each element or compound. Oxidation involves the gain of electrons of hydrogen or the loss of oxygen or decrease in oxidation state. If zinc completely reacts with HCL‚ then the theoretical yield of copper should be equivalent to the actual yield
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solution as soon as it starts to boil. 8) Repeat steps 3‚ 6 and 7 using distilled water. 9) Make observations. Expected results: the boiling point of the salt solution will be higher than the boiling point of the distilled water because sodium chloride is a non- volatile substance and an impurity when added to water. Therefore the substance does not change to vapour under normal heat conditions‚ because the bonds in the substances are stronger so a lot of heat must be applies and this will cause
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separated the furthest and produced Rf calculations for all of the suspects except Ms. Buchner. Changing the solvent allowed us to have a better resolution of the separated components. Acetic acid separation for the samples were very small sodium chloride solution was also similar to Acetic acid. Conclusion The unknown of NaCl and Acetic
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disassociation of Sodium Hydroxide: NaOH (aq)Na+ (aq)+ OH-(aq) b. Aqueous NaCl—Sodium Chloride contains both sodium and chloride ions‚ but in the solid state they are locked in place and therefore unavailable to conduct electricity. But‚ when NaCl is dissolved in water‚ the ions are free to move and conduct electricity‚ making NaCl a strong electrolyte. Chemical reaction of the disassociation of Sodium Chloride: NaCl(aq)Na+ (aq)+ Cl-(aq) c. Aqueous Formic Acid—HCOOH‚ formic acid‚ is a weak electrolyte
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into your beaker and add 50 mL of distilled water. 2) Set up the beaker stand and burner fuel and heat the beaker of solids and water to near boiling. Stir the mixture to make sure all soluble material dissolves. The benzoic acid and the sodium chloride should have dissolved and been extracted from the insoluble sand. 3) Pour the liquid while it is hot into a small paper or Styrofoam cup. 4) Pour another 10 to 15 mL of distilled water into the beaker containing the sand‚ bring the mixture
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Investigation of the point of incipient plasmolysis of onion cells (Allium cepa) using NaCl (Sodium Chloride) concentrations of 0.1M‚ 0.2M‚ 0.3M‚ 0.4M‚ 0.5M‚ 0.6M Design Research Question (Aim): The aim of this lab was to determine the point of incipient plasmolysis of onion (Allium cepa) cells using Sodium Chloride (NaCl) concentrations of 0.1M‚ 0.2M‚ 0.3M‚ 0.4M‚ 0.5M‚ 0.6M. Hypothesis: When the water concentration of a solution outside the cell is lower than the concentration inside the cell
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General ColleGe Chemistry LabPaq / Published by: Hands-On Labs‚ Inc. sales@HOLscience.com / www.HOLscience.com / Toll Free 866.206.0773 a laboratory manual of small-scale experiments for the independent study of General College Chemistry 50-0125-CK-01 LabPaq® is a registered trademark of Hands-On Labs‚ Inc. (HOL). The LabPaq referenced in this manual is produced by Hands-On Labs‚ Inc. which holds and reserves all copyrights on experiences. The laboratory manual included with a LabPaq
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immunoassay was performed in a transparent high binding 96 well microtiter plate. Each well was coated with 200 µL of 1mg/L anti-mouse IgG in PBS (phosphate buffered saline‚ 10 mM sodium dihydrogen phosphate‚ 70 mM sodium hydrogen phosphate‚ 145 mM sodium chloride‚ pH 7.6). The microtiter plate was left over night for shaking at 750 rpm. Therefore‚ the plate was washed three times with automatic 96-channel plate washer by washing buffer (45 M potassium dihydrogen orthophosphate‚ 0‚375 mM dipotassium phosphate
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Evelyn Ramos CHEM LAB 201-003 Professor Ruddock Experiment #4 - Chemical Reactions Performed: 3/6/13 DUE: 3/13/13 Pre Lab Questions: 1. Before you can write a chemical equation‚ what must you know? You have to know what the products and reactants are. 2. What observations might you make that suggest that a chemical reaction has occurred? If a gas is produced or precipitates are formed that indicates chemical reaction. Also‚ if color changes occur or
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