To obtain solid NaCl from this mixture, the student should Remove the sand by filtration, then evaporate the water we will get the solid NaCl from the mixture. ( Option 1 )
<u>Explanation:</u>
The mixture contains solid NaCl and sand, in which the sand gets settled down at the bottom of the container, whereas solid sodium chloride (NaCl) gets dissolved in the water.
- We have to first separate the sand by means of a common purification method known as filtration.
- Followed by Filtration of sand we must then filtrate must contain the solution of NaCl, which can be separated by evaporating the solution.
- On evaporation, we will get the crystals of NaCl in the purest form.
Thus we can conclude option 1 as correct answer.
Answer:
The answer is attached below.
Explanation:
This solution is "supersaturated".
A supersaturated solution is a solution that contains a higher than than the concentration of solute, slight unsettling influence or seeding causes crystallization of abundance solute.
Supersaturation is a condition of a solution that contains a greater amount of the dissolved material than could be dissolved by the solvent under ordinary conditions.
Due to law of conservation of mass, the mass will not change.
in an open container the weight will change as when the chemical reaction goes, carbonic acid, H2CO3 forms which decomposes into CO2 and H2O, and the CO2 will release, decreasing the weight.