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.

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Chapter1: Chemical Foundations
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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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