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2 Why is the observation of an increase in temperature when two substances are mixed not absolute proof that a chemical reaction occurred? 3. When lead (II) nitrate and sodium sulfide are mixed a black solid precipitate is formed. What is the identity of that compound? 4. A solution of Hg(NO3)2 is mixed with a solution of KBr. Both of these solutions are colorless. A white precipitate forms. Write the balanced equation representing the chemical reaction that took place. 5. Pblz is a bright yellow solid that does not dissolve in water. What two solutions can be mixed that would result in a precipitate of Pbl2 being formed?

2 Why is the observation of an increase in temperature when two substances are mixed not absolute proof that a chemical reaction occurred? 3. When lead (II) nitrate and sodium sulfide are mixed a black solid precipitate is formed. What is the identity of that compound? 4. A solution of Hg(NO3)2 is mixed with a solution of KBr. Both of these solutions are colorless. A white precipitate forms. Write the balanced equation representing the chemical reaction that took place. 5. Pblz is a bright yellow solid that does not dissolve in water. What two solutions can be mixed that would result in a precipitate of Pbl2 being formed?

Chemistry by OpenStax (2015-05-04)
Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter15: Equilibria Of Other Reaction Classes
Section: Chapter Questions
Problem 51E: Magnesium metal (a component of alloys used in aircraft and a reducing agent used in the production...
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1. A sample of a solution is tested with red litmus paper. There is no color change. What is the correct INTERPRETATION of this observation? - why is the observation of an increase in temperature when two substances are mixed not absolute proof that a chemical reaction occurred? 3. When lead (II) nitrate and sodium sulfide are mixed a black solid precipitate is formed. What is the identity of that compound? 4. A solution of Hg(NO3)2 is mixed with a solution of KBr. Both of these solutions are colorless. A white precipitate forms. Write the balanced equation representing the chemical reaction that took place. 5. Pblz is a bright yellow solid that does not dissolve in water. What two solutions can be mixed that would result in a precipitate of Pbl2 being formed?
Transcribed Image Text:1. A sample of a solution is tested with red litmus paper. There is no color change. What is the correct INTERPRETATION of this observation? - why is the observation of an increase in temperature when two substances are mixed not absolute proof that a chemical reaction occurred? 3. When lead (II) nitrate and sodium sulfide are mixed a black solid precipitate is formed. What is the identity of that compound? 4. A solution of Hg(NO3)2 is mixed with a solution of KBr. Both of these solutions are colorless. A white precipitate forms. Write the balanced equation representing the chemical reaction that took place. 5. Pblz is a bright yellow solid that does not dissolve in water. What two solutions can be mixed that would result in a precipitate of Pbl2 being formed?
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