the anions we were testing for could only be determined from one specific result for example if a black precipitate formed following the tests the substance is therefore a sulphide however the same result would also show the presence of carbonate and hydrogen carbonate this therefore means that it is difficult to distinguish between the two and therefore further tests would need to be carried out this test enables you to distinguish clearly between the two and includes adding a drop of phenolphthalein
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Silver Nitrate(AgNO3) 1M Potassium Nitrate(KNO2) Calcium Chloride (CaCl2) Barrium Hydroxide Ammonium Hydroxide (NH3OH) Methylene Chloride Test Tube/Test Tube Holder Eye Dropper Eye Dropper Beaker Pipette Pipette Bulb Litmus Paper Hot Plate Observations/Calculations: CO3 + H2SO4 = bubbly reaction‚ little to no colour change. CO3 + 6M HCl = Barrium hydroxide began to go cloudy‚ indicating the presence of BaCO3(Carbonate anions) Chloride Solution + 0.1M AgNO3 =white
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off in some places‚ revealing crumbling stone beneath. This black crust is primarily composed of gypsum‚ a mineral that forms from the reaction between calcite‚ water‚ and sulfuric acid. Gypsum is soluble in water; although it can form anywhere on carbonate stone surfaces that are exposed to sulfur dioxide gas (SO2)‚ it is usually washed away. It remains only on protected surfaces that are not directly washed by the rain. Gypsum is white‚ but the crystals form networks that trap particles of dirt and
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Renal disease case study This case relates to renal disease; therefore~ purposefully look into the medication use and vocabulary as they relate to renal patients. Vocabulary: Before attempting to work the case study‚ define each of the vocabulary words. Although the words may have several subheadings‚ it will give you a place to begin your inquiry. When reviewing the vocabulary words‚ you might want to ask several questions: who‚ what‚ where‚ when‚ why and how. This should give you a much broader
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Title: Determination of chloride by the Mohr Method Objective: To determine chloride by using Mohr Method. Introduction: The Mohr method is the method used to determine the chloride ion concentration of a solution by titration with silver nitrate. As the silver nitrate solution is slowly added‚ a precipitate of silver chloride forms. Ag+ + Cl- AgCl(s) (Ksp for AgCl is 1.810-10) The chloride ion (Cl-) is an important anion found in solids and solutions. Chloride is the predominant anion
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limewater‚ it becomes hazy. After a couple more breaths‚ the limewater becomes cloudy then becomes cloudy white as milk. Our breath contains carbon dioxide‚ and when it reacts with the limewater which contains Ca(OH)2 calcium hydroxide‚ it produces a new substance‚ CaCO3 calcium carbonate. 4. Write the equation(s) for the reaction that occur when the breath is blown through limewater. CO2(g) + Ca(OH)2(aq) CaCO3(s) + H2O(l) 5. Complete and balance the following (assume that complete oxidation occurs)
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A small amount of the unknown (approximately the tip of the spatula was used for all the pigments) was added into each clean dry test tube. For the first test 1 mL of 3 M of HNO3 was added. As soon as the acid came into with the solid‚ the pigment was observed to dissolve while also turning the solution into a pale clear colour. The same amount was used for the HCl reagent. As soon as the acid touched the pigment it yielded in a clear solution (solid dissolved after a few shakes). When the KI was
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We have no way of knowing what the two products are. 19. The formula for europium carbonate is Eu2(CO3)3. On the basis of this information‚ the formula for the chlorate of europium would be expected to be? a. EuCl2. b. EuCl3. c. Eu2(ClO3)3. d. Eu(ClO4)2. e. Eu(ClO3)3. CO3 has a 2- charge‚ therefore the Eu must have a 3+ charge.
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Objectives: Observe the reaction between solutions of sodium carbonate and calcium chloride. Determine which of the reactants is the limiting reactant and which is the excess reactant. Determine the theoretical mass of precipitate that should form. Compare the actual mass with the theoretical mass of precipitate and calculate the percent yield. Materials: Balance 0.70 M sodium carbonate solution‚ Na2CO3(aq) Graduated cylinder 0.50 M calcium chloride solution‚ CaCl2(aq) Beaker (250 mL) Wash
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Coral reefs are one of the world’s hidden treasures. In a coral reef‚ you can find anything from plants to certain types of animals. Some of the coral that you might see can be dangerous and fatal to humans. While some coral reefs are dangerous‚ others aren’t. There are a lot of things in a coral reef and many topics worth being discussed‚ but only three topics will be touched on throughout this paper. The first topic is the food web within the coral reefs; the second topic being discussed will be
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