3. Methane (CH) or natural gas is a colorless, odorless gas. Chemical companies add a chemical that gives off a distinctive odor with the gas. This is the reason we seem that rotten ogg smell when it is leaking. Why is this necessary? Station 2: At this station you are observing the reaction of two compounds, potassium iodide and lead (II) nitrate. Describe what happened below: Balance the equation KI ( ) Pb(NO3)2 ( ) --> KNO, ( ) + Pbl2 ( ) 1. What type of reaction is occurring? How did you know? 2. What is the physical state of the reactants? Put each state of matter in the balanced

3. Methane (CH) or natural gas is a colorless, odorless gas. Chemical companies add a chemical that gives off a distinctive odor with the gas. This is the reason we seem that rotten ogg smell when it is leaking. Why is this necessary? Station 2: At this station you are observing the reaction of two compounds, potassium iodide and lead (II) nitrate. Describe what happened below: Balance the equation KI ( ) Pb(NO3)2 ( ) --> KNO, ( ) + Pbl2 ( ) 1. What type of reaction is occurring? How did you know? 2. What is the physical state of the reactants? Put each state of matter in the balanced

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter4: Stoichiometry

Section: Chapter Questions

Problem 4.57PAE

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On Easter Sunday, April 3, 1983, nitric acid spilled from a tank car near downtown Denver, Colorado. The spill was neutralized with sodium carbonate: 2HNO3(aq)+Na2CO3(aq)2NaNO3(aq)+H2O(l)+CO2(g) a. Calculate H for this reaction. Approximately 2.0 104 gal nitric acid was spilled. Assume that the acid was an aqueous solution containing 70.0% HNO3 by mass with a density of 1.42 glcm3. What mass of sodium carbonate was required for complete neutralization of the spill, and what quantity of heat was evolved? (Hf for NaNO3(aq) = 467 kJ/mol) b. According to The Denver Post for April 4, 1983, authorities feared that dangerous air pollution might occur during the neutralization. Considering the magnitude of H, what was their major concern?
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