Calculate the final concentration of 2L of 3M and 4L of 1.50M are mixed.

Question

There is no volume contractoin upon mixing

Answer 1

Hello Josue

 

For each solution, first calculate the # of moles by multiplying the volume and the molarity (M = mol/L).

 

mol₁ = 3 mol/L x 2L = 6 mol

 

mol₂ = 1.50 mol/L x 4L = 6 mol

 

Total # of moles after mixing = 6 + 6 = 12 mol

 

Total volume of solution after mixing = 2 + 4 = 6L

 

Final molarity (concentration) = 12 mol / 6 L = 2 mol/L = 2M