Which is the more concentrated solution: a solution made with .70 moles of NaCl in a .35L water or a 35g of NaCl in .75L?
To determine which solution is more concentrated, we need to calculate the concentration of each solution. Concentration is typically expressed in units of moles per liter (mol/L) or grams per liter (g/L).
Let's start with the first solution, which has 0.70 moles of NaCl in 0.35 L of water. To calculate the concentration in moles per liter (mol/L), we divide the number of moles of NaCl by the volume of the solution:
Concentration = Number of moles / Volume
Concentration = 0.70 moles / 0.35 L
Calculating this, we find that the concentration of the first solution is 2.0 mol/L.
Now let's determine the concentration of the second solution, which has 35 g of NaCl in 0.75 L of water. To calculate the concentration in grams per liter (g/L), we divide the number of grams of NaCl by the volume of the solution:
Concentration = Mass of NaCl / Volume
Concentration = 35 g / 0.75 L
Calculating this, we find that the concentration of the second solution is 46.7 g/L.
Comparing the two concentrations, we can see that the concentration of the first solution (2.0 mol/L) is higher than the concentration of the second solution (46.7 g/L). Therefore, the solution made with 0.70 moles of NaCl in 0.35 L of water is more concentrated.