Preparazione della soluzione di metilammina libera

[B APPLE]

Teacher, may I ask if after adding sodium hydroxide to the water and stirring until dissolved, it will no longer be transparent！

 

[mycelium]

It literally says that you WAIT FOR THE EXOTHERMIC REACTION TO BE DONE which is clear liquid and cooled down

 

[Arakava]

I used 57g menh2 hcl + 34g naoh in 46g water. My collecting flask contained 82g water. At the end I collected 126g methylamine solution. It means 44g added to final solution. Is it possible? 44g menh2 of 57g menh2 hcl?
Or water also was evaporating with menh2? Because boiling flask temperature slowly reached 85°c.

 

[G.Patton]

You can count and check it like this:
Molar amount of 57g MeNH*HCl = 57/67.518 = 0.844 moles.
How much grams of MeNH2 can it gives? 0.844 mol * 31.1 g/mol(molar mass of MeNH2)= 26.3 g

I assume that there is water as well.