hey guys! so here are 2 GC problems that I feel are the same but go about a different way to find the answer and I was wondering how you differentiate the two.
#1) From destroyer:
"A LiCl solution has a density of 1.13 g/cm^3 at 25C. If the solution is 20% by weight LiCl, what is the molarity?"
-So the way it shows to work this out is to think of the 20% to mean 20g LiCl in 100 g of solution. From here you would do dimensional analysis until you have the molarity.
#2) From Qvault:
"A solution of HCl contains 36% HCl by mass. What is the molality of the solution?"
-Here, the explanation shows that you should think of a 36% solution to mean 36g HCl and 64g H2O. From here you would do dimensional analysis and solve until you have the molarity.
---so my question is, why in the first problem do you consider 20% to mean 20g LiCl in 100 g of solution but in the second problem, a 36% solution means 36g HCl and 64g H2O? 🙁
#1) From destroyer:
"A LiCl solution has a density of 1.13 g/cm^3 at 25C. If the solution is 20% by weight LiCl, what is the molarity?"
-So the way it shows to work this out is to think of the 20% to mean 20g LiCl in 100 g of solution. From here you would do dimensional analysis until you have the molarity.
#2) From Qvault:
"A solution of HCl contains 36% HCl by mass. What is the molality of the solution?"
-Here, the explanation shows that you should think of a 36% solution to mean 36g HCl and 64g H2O. From here you would do dimensional analysis and solve until you have the molarity.
---so my question is, why in the first problem do you consider 20% to mean 20g LiCl in 100 g of solution but in the second problem, a 36% solution means 36g HCl and 64g H2O? 🙁
