write the chemical equation of the following reaction in in which following changes have taken place with an example of each:a)change in colour b)change in temprqture c) formation of precipitate
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- change in color
- Fe + CuSo4 --------->FeSo4 + CuSo4
here the iron displace the copper and so the color of FeSo4 is became blue.
- formation of precipitation
2. BaCl2 + Na2So4 -------->BaSo4 +NaCl
In this reaction BaSo4 is the precipitate.
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Answer:
1. Change in colour :
The reaction between lead nitrate solution and poassium iodide solution.
Chemical equation as follow :
Pb ( NO₃ )₂ + 2 KI ⇒ PbI₂ + 2 KNO₃
In above reaction colour change from colourless to yellow.
2. Change in temperature :
The reaction between dil. sulphuric acid on zinc.
Chemically :
Zn + H₂SO₄ ⇒ ZnSO₄ + H₂
Heat evolved in the above reaction.
3. Formation of precipitation :
The reaction between barium chloride on sodium sulphate.
Chemically :
BaCl₂ + Na₂SO₄ ⇒ BaSO₄ + 2 NaCl
In the above reaction white ppt. of BaSO₄ will form.
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