Is the reaction between potassium iodide and lead (II) nitrate a physical change or a chemical change?
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Answer:When you add lead nitrate to potassium iodide, their particles combine and create two new compounds, a yellow solid called lead iodide and a white solid called potassium nitrate. Yellow clouds indicate that the chemical change has taken place.
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The reaction between potassium iodide and lead (II) nitrate is a CHEMICAL CHANGE.
CHEMICAL CHANGE -
- An irreversible change involves chemical bonding and change in the molecular structure of the reactants.
- The reactants undergo reactions to form new chemical products.
- The reaction of potassium iodide with lead nitrate is a double-displacement chemical change.
- The double displacement reaction is characterised by the formation of an insoluble salt, precipitate.
- The potassium ions replace lead to form potassium nitrate and lead ions react with iodide ions to form lead iodide.
- The lead iodide is the insoluble salt precipitate of yellow color formed after the reaction.
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