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    Gravimetric Analysis

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    determine the amount of sulphate in barium sulphate quantitatively. We can do so by slowly adding dilute barium sulphate to an unknown sulphate solution that has been heated and acidified with concentrated hydrochloric acid slightly. A white precipitate will be yield from filtering the solution. It will then be washed with distilled water to rid any impurities and be put into an oven to dry. Once the precipitate has been dried‚ it will be taken out to be weighed as barium sulphate. The percentage of sulphate

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    demonstration is beneficial to use in both the Solution and Solubility‚ and Chemical Reactions units. | Materials | distilled water – saturated sodium bicarbonate (NaHCO3) – 20% sodium carbonate solution (Na2CO3) - phenolphthalein indicator – saturated barium chloride (BaCl2) – sodium dichromate crystals – concentrated hydrochloric acid – water glass – wine glass – milk glass – beer mug | Safety | All chemicals must be handled carefully and with respect. The solids and liquids used in this inquiry are

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    Online Enrollment System

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    Top of Form Bottom of Form Chemical Compound Formulas Chemistry is the study of the composition of matter and its transformation. A substance can be considered matter with definite properties that establishes its identity. The tremendous number of chemical compounds has been categorized into numerous categories. A broad classification distinguishes between inorganic and organic compounds. Organic compounds are carbon based. Inorganic compounds exclude compounds exclude compounds based on carbon

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    In the formation of barium white‚ the reaction involved was a double displacement reaction in which sodium in sodium sulfate being more reactive‚ was replaced by barium from barium chloride and was able to form barium sulfate‚ a white solid pigment and sodium chloride 2. As barium sulfate is insoluble in water it was relatively easy to observe and interpret what was happening as the chemicals mixed

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    Intermolecular forces – design lab Research question: To calculate the solubility of equal masses nitrates of four di-positive ions (Lead Nitrate‚ Barium Nitrate‚ Copper Nitrate & Ferrous Nitrate of 0.5 M concentration) in an equal volume of water and relate this to the ionic radius of the element and the molar mass of the nitrate chosen and hence comment on the intermolecular forces in each of these nitrates. + write mass Justification of the research question: I was particularly interested

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    reaction taking place and it gives them a better understanding of how chemical reactions work and what products they may form. Materials & Procedure Materials: * Wood Splints - Copper Sulfate * Sodium Sulfate - Copper Wire * Barium Chloride - 6% Hydrogen Peroxide * Mossy Zinc - Copper Sulfate Pentahydrate * Hydrochloric Acid - Iron Filings * Manganese Dioxide Procedure: Reaction A Place a scoop of copper (II) sulfate pentahydrate crystals in a clean‚

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    Flame Lab

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    different flame color. Purpose The purpose of the lab is to determine the characteristic colors produced by certain metallic ions when vaporized in a flame and identify unknown metallic ions by means of their flame tests. Materials •Barium Chloride •Calcium Chloride •Cupric Chloride •Lithium Chloride •Potassium Chloride •Sodium Chloride •Strontium Chloride •Bunsen burner •Flint striker •Wooden splints •Goggles Procedure 1. Prepare

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    Sodium Sulfate that would confirm our compound and show its chemical properties. In each reaction‚ we replaced the presence of Sodium Sulfate with our unknown. Our first reaction was the reaction from the sulfate anion test between Sodium Sulfate and Barium Chloride. If the compound was in fact Sodium Sulfate it would produce a white precipitate and it did. The second reaction was first between Sodium Sulfate and Hydrochloric Acid‚ and then Silver Nitrate was added. For the compound to be confirmed‚

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    in an increase in the solubility of any free anions present in the sample. This will happen because the present anions will bind with the hydrogen cations present in the acid. B. The sodium sulfate is boiled because experiments have shown that barium sulfate is 50 times more soluble at 100°C than at room temperature. At the higher temperature‚ the Ba2+ and the SO42- are more likely to find each other and to form bonds and precipitate more slowly. If this happens too rapidly‚ then there is a high

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    Experiment No. 2: Dynamic Equilibrium and Le Chatelier’s Principle December 1‚ 2011 Final Formal Results Le Chatelier’s Principle states that “when a stress is applied to a chemical system at equilibrium‚ the equilibrium shifts in a direction that reduces the effect of stress” (Gross‚ Abenojar‚ and Tan 23). Moreover‚ it helps us “predict the direction of the shift of the equilibrium” (Silberberg 745). Silberberg also stated that there are three kinds of disturbances - concentration‚

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