Praveen took lead nitrate solution in a test tube and added sodium chl

1.	Praveen took lead nitrate solution in a test tube and added sodium chloride solution toit. How will he prove that the reaction satisfies the law of conservation of mass?
Answer» Answer: $\huge\underline\mathcal\green{AnSWer}$ The residue left on evaporation will mostly be a mixture of three salts.The two definite ones are lead CHLORIDE and sodium NITRATE formed by the double displacement between sodium chloride and lead nitrate.2NaCl (aq) + PB(NO3)2 (aq) ——→ PbCl2 (s) + 2NaNO3 (aq)The THIRD constituent will be either the unreacted NaCl or Pb(NO3)2 that is present in excess of the 2:1 molar ratio in which these two salts react as per the above equation.But if NaCl and Pb(NO3)2 are taken in the exact 2:1 molar ratio in the test tube with sufficient water, the contents on evaporation are expected to yield, at least theoretically, a solid mixture having only NANO3 and PbCl2, in the 2:1 molar ratio. There should not be any unreacted NaCl or Pb(NO3)2 as a third constituent.

Praveen took lead nitrate solution in a test tube and added sodium chloride solution toit. How will he prove that the reaction satisfies the law of conservation of mass?

Answer»

Answer:

$\huge\underline\mathcal\green{AnSWer}$

The residue left on evaporation will mostly be a mixture of three salts.The two definite ones are lead CHLORIDE and sodium NITRATE formed by the double displacement between sodium chloride and lead nitrate.2NaCl (aq) + PB(NO3)2 (aq) ——→ PbCl2 (s) + 2NaNO3 (aq)The THIRD constituent will be either the unreacted NaCl or Pb(NO3)2 that is present in excess of the 2:1 molar ratio in which these two salts react as per the above equation.But if NaCl and Pb(NO3)2 are taken in the exact 2:1 molar ratio in the test tube with sufficient water, the contents on evaporation are expected to yield, at least theoretically, a solid mixture having only NANO3 and PbCl2, in the 2:1 molar ratio. There should not be any unreacted NaCl or Pb(NO3)2 as a third constituent.

Praveen took lead nitrate solution in a test tube and added sodium chloride solution toit. How will he prove that the reaction satisfies the law of conservation of mass?

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment

Praveen took lead nitrate solution in a test tube and added sodium chloride solution toit. How will he prove that the reaction satisfies the law of conservation of mass?​

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment

Praveen took lead nitrate solution in a test tube and added sodium chloride solution toit. How will he prove that the reaction satisfies the law of conservation of mass?