Define:
Evolution of a gas
formation of a precipitate
change in colour
change in temperature and
change in state
plz short answer
Answers
Answer:
evolution of the gas in the chemicl reaction in which end product are gases .ex .co2,o2.
precipitation is the creation of solid form a solution .when the reaction ocurrs in a liquid solution.
in the chemicl reaction in which subtances change its colour in the products side.
Explanation:
hope this helps u
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.