What is the molarity of the resulting solution obtained by mixing 2.5liter of 0.5M urea solution and 500 ml of 2M urea solution?

Answer 1

The 0.5M and 2M refer to moles per liter (of solution). Volume of final solution is 2.5 L + 500 mL = 2.5 L + 0.5 L = 3.0 L. So find out how many moles the final solution has and divide by 3.0L.

First solution (0.5 moles/liter)*(2.5 liter) = 1.25 moles

2nd solution (2 moles/liter)*(0.5 liter) = 1 mole

Molarity: (1.25 mole + 1 mole)/(3.0 liter) = 0.75 moles/liter = 0.75 M

Answer 2

To find the molarity of the resulting solution, we need to calculate the total moles of urea in both solutions and then find the total volume of the mixed solutions. Next, we divide the total moles of urea by the total volume in liters to get the molarity. After performing these calculations, the molarity of the resulting solution would be around 0.67M.