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enbel ZFIO You want to analyze a magnesium nitrate solution. (a) In your lab you have...
You have a toxic chromium nitrate solution (5.00x10^2 g total solution mass). You don't the oxidation...
You have a toxic chromium nitrate solution (5.00x10^2 g total solution mass). You don't the oxidation state of the chromium ( assume that it does not change over the course of this protocol. By adding excess sodium carbonate (na2co3), you precipitate 67.6g of cr2 (co3)3. Calculate the molality of the original chromium nitrate solution. A. 1.23 Molal B. 1.34 Molal C 1.39 Molal D. 1.48 Molal E. 1.57 molal
Suppose we have bought a cleaner at the grocery store, and notice it gives off a...
Suppose we have bought a cleaner at the grocery store, and notice it gives off a gas that turns moist red litmus paper blue. Which of the following chemical species *could* be the culprit? Group of answer choices Acetic Acid Ammonia Sodium ions Hydrogen Gas Question 21 You notice a white, crystalline powdered substance in your pantry but have no idea what it is. Suppose the substance was bought at the grocery store years ago, and the label has worn...
Model I: The Dissolution of Magnesium Hydroxide in Water When solid Mg(OH)2 dissolves in water, the...
Model I: The Dissolution of Magnesium Hydroxide in Water When solid Mg(OH)2 dissolves in water, the chemical reaction is: Mg(OH)2(s) Mg2+(aq) + 2OH-(aq) (1) Table I. These are the results after equilibrium has been established for the addition of solid Mg(OH)2(s) to water yielding a final volume of 10.0 L of solution. Total amount of Mg(OH)2 added Mg2+ concentration in the resulting solution at eq OH- concentration in the resulting solution at eq Mass of Mg(OH)2 that does not dissolve...
i am needing help with question 4 and 5. anything else helps Name Experiment 7 Calorimetry Postlab: Questions 25 points possible Section (day&time) Instructor Due date Answer the following qu...
i am needing help with question 4 and 5. anything else
helps
Name Experiment 7 Calorimetry Postlab: Questions 25 points possible Section (day&time) Instructor Due date Answer the following questions using complete sentences and support your answers with swers calculations, if desired. Attach additional pages as necessary. Handwritten or typed an are acceptable.(5 pts per question) 1. If som e of your hot metal remained in the test tube when it was transferred to the eter, would its calculated molar...
You have 315 mL of an aqueous solution that is 0.29 M Na2SO4 and a separate...
You have 315 mL of an aqueous solution that is 0.29 M Na2SO4 and a separate 250 mL aqueous solution that is 0.41 M BaCl2- a). How many moles of each of the four ions are present (do not use the word "moles" in your answer, just the number)? Na+ 5042- Ba2+ ci b). When these two solutions are mixed together, what is the chemical formula of the solid expected to precipitate from the mixture? (Don't forget to put (s)...
Determining Solution Concentration by Evaporation Pre-lab Nam Section In the lab, you weigh an empty beaker...
Determining Solution Concentration by Evaporation Pre-lab Nam Section In the lab, you weigh an empty beaker and find it to be 28.3456 grams. You use a volumetric pipet to transfer 50.00 mL of a sodium chloride solution into the beaker and weigh the beaker again to get 80.5678 grams. You boil the salt water, being careful to turn down the heat near the end of the process in order to minimize the amount of 'popping' that occurs. At the very...
I have completed this lab (Experiment 13 Acid and Base, Part 2) and want feedback on...
I have completed this lab (Experiment 13 Acid and Base, Part 2) and want feedback on if I doing the equations correctly? I have included my answers in the question. Are these correct? Pour about an inch of lemon juice into one jar and label it "acid." Put two level teaspoons of baking soda and about half a tablespoon of water in another jar. Now pour a tablespoon of lemon juice acid into the third jar for testing. Add the...
Your lab is studying the decomposition of potassium thiocyanate in aqueous solution. At 22.15°C, you find...
Your lab is studying the decomposition of potassium thiocyanate in aqueous solution. At 22.15°C, you find that the rate law constant is 0.427 M-2min-1. One of your labmates has found that at 14.29°C the rate law constant is 0.0527 M-2min-1. What is the activation energy for this reaction? Report your answer in kilojoules per mole, kJ/mol, and use R = 8.314J/mol*K in your calculations.
Your lab is studying the decomposition of potassium thiocyanate in aqueous solution. At 24.21°C, you find...
Your lab is studying the decomposition of potassium thiocyanate in aqueous solution. At 24.21°C, you find that the rate law constant is 0.413 M-2min-1. One of your labmates has found that at 12.13°C the rate law constant is 0.0525 M-2min-1. What is the activation energy for this reaction? Report your answer in kilojoules per mole, kJ/mol, and use R = 8.314J/mol*K in your calculations.
Experiment 8 Double Replacement Reactions Background: Some reactions have the net effect of causing the cation...
Experiment 8 Double Replacement Reactions Background: Some reactions have the net effect of causing the cation of each reactant to trade places, forming a compound with the other anion. These reactions are known as double replacement reactions. In the example below (unbalanced equation), the barium and sodium cations switch places so that barium forms a product with sulfate while sodium forms a product with chloride. Note that the formula of each product is determined by the charges of the ions,...
i am needing help with question 4 and 5. anything else
helps
Name Experiment 7 Calorimetry Postlab: Questions 25 points possible Section (day&time) Instructor Due date Answer the following questions using complete sentences and support your answers with swers calculations, if desired. Attach additional pages as necessary. Handwritten or typed an are acceptable.(5 pts per question) 1. If som e of your hot metal remained in the test tube when it was transferred to the eter, would its calculated molar...
You have 315 mL of an aqueous solution that is 0.29 M Na2SO4 and a separate 250 mL aqueous solution that is 0.41 M BaCl2- a). How many moles of each of the four ions are present (do not use the word "moles" in your answer, just the number)? Na+ 5042- Ba2+ ci b). When these two solutions are mixed together, what is the chemical formula of the solid expected to precipitate from the mixture? (Don't forget to put (s)...
Determining Solution Concentration by Evaporation Pre-lab Nam Section In the lab, you weigh an empty beaker and find it to be 28.3456 grams. You use a volumetric pipet to transfer 50.00 mL of a sodium chloride solution into the beaker and weigh the beaker again to get 80.5678 grams. You boil the salt water, being careful to turn down the heat near the end of the process in order to minimize the amount of 'popping' that occurs. At the very...
Experiment 8 Double Replacement Reactions Background: Some reactions have the net effect of causing the cation of each reactant to trade places, forming a compound with the other anion. These reactions are known as double replacement reactions. In the example below (unbalanced equation), the barium and sodium cations switch places so that barium forms a product with sulfate while sodium forms a product with chloride. Note that the formula of each product is determined by the charges of the ions,...
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