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Questions and Answers
What is the color of the precipitate formed when lead ions react with iodide ions?
What is the color of the precipitate formed when lead ions react with iodide ions?
Which acid radical reacts with barium ions to form a white precipitate?
Which acid radical reacts with barium ions to form a white precipitate?
What color is the precipitate when copper ions react with hydroxide ions?
What color is the precipitate when copper ions react with hydroxide ions?
Which of the following radicals produces a pale yellow precipitate when reacted with silver ions?
Which of the following radicals produces a pale yellow precipitate when reacted with silver ions?
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Which acid radical is known to produce effervescence when reacted with dilute acids?
Which acid radical is known to produce effervescence when reacted with dilute acids?
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Study Notes
Lead (Pb2+)
- Lead ions (Pb2+) are a basic radical
- Lead ions form a white precipitate when reacted with iodide ions (I-)
- The reaction forms lead iodide (PbI2), which is yellow.
Sulfate (SO42-)
- Sulfate ions (SO42-) are an acid radical
- Sulfate ions form a white precipitate when reacted with barium ions (Ba2+)
- The reaction forms barium sulfate (BaSO4), which is white.
Chloride (Cl-)
- Chloride ions (Cl-) are an acid radical
- Chloride ions form a white precipitate when reacted with silver ions (Ag+)
- The reaction forms silver chloride (AgCl), which is white precipitate.
- This is a confirmatory test for chloride ions.
Copper (Cu2+)
- Copper ions (Cu2+) are a basic radical
- Copper ions form a blue precipitate when reacted with hydroxide ions (OH-)
- The reaction forms copper hydroxide (Cu(OH)2), which is blue precipitate.
Iron (Fe3+)
- Iron (III) ions (Fe3+) are a basic radical
- Iron (III) ions form a brown precipitate when reacted with hydroxide ions (OH-)
- The reaction forms iron (III) hydroxide (Fe(OH)3), which is a brown precipitate.
- This is a confirmatory test for ferric ions.
Carbonate (CO32-)
- Carbonate ions (CO32-) are an acid radical
- Carbonate ions produce effervescence (bubbles) when reacted with dilute acids
- This reaction forms carbon dioxide gas (CO2) which is released as bubbles.
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Description
This quiz covers the reactions of various cations and anions, including lead, sulfate, chloride, copper, and iron ions. It focuses on identifying precipitates formed during chemical reactions involving these radicals. Test your knowledge on the properties and reaction outcomes associated with these ions.
