The answer is Physical Means. I hope this helps. :)
Hygroscopic nature of NaOH is the main reason for the lower concentration of the sodium hydroxide in the solution.
<u>Explanation:</u>
- It is a well known fact that Sodium hydroxide pellets are hygroscopic in nature, which clearly means that the sodium hydroxide pellets absorbs moisture from the air, so that it becomes deliquescent.
- When the NaOH crystals are weighed, the crystals absorb moisture from the surroundings, and so the weight of the crystals may change, so the concentration of the solution was lower than the required one.So it is not possible to prepare NaOH solution under normal room temperature.
- So, while preparing the solution of NaOH we have to be more careful.
Answer:
The gasoline undergoes a change as it burns.
Explanation:
Just took the Unit Test review ((:
Answer:
10 mol/kg.
Explanation:
Molality can be defined as the number of moles of solute divided by the mass of solvent.
Number of moles = mass/molar mass
= 25/25
= 1 mol.
Mass of solvent in kg = 100 g * 1 kg/1000 g
= 0.1 kg
Molality, m = 1/0.1
= 10 mol/kg.
Think about what you do daily and answer the questions