4 mols HCl
= 4 * (1+35.5) = 146 grams of HCl per liter
so either mix a liter that way and pour out .2 liter
or
put .2*146 = 29.2 grams of HCl in .2 liter of water
Of course that is easier said than done because how do you get 29.2 grams of the acid HCl ? It is not a solid that you can weigh on a scale. It is either available as a standard solution which you can dilute or it exists as a gas. So you would do it by diluting in real life.
1.how to prepare
a)200ml of a 4MHCl?
b)100ml of a 1.5NaOH?
2 answers
CAUTION!! If working to dilute manufactured concentrate of any acid, be sure to add HCl concentrate to ~ half of final volume needed for solution. Adding water onto 146gms of HCl (~172-ml of concentrated acid) will ionize so fast and give off sufficient heat that the liquid acid might explode. Wear protective clothing and safety goggles for sure.
1 answer