if you have 100 ml each of 1.0 m solutions of NaCl,KCl, and CaCl2 which solution would have the largest mass? explain..
think about it...
molality = moles of solute/ kg of solvent
nacl
To determine which solution would have the largest mass, you need to calculate the molar mass of each substance and then calculate the mass of each solution using the given volume and molarity.
1. Calculate the molar mass of NaCl (sodium chloride):
NaCl has one sodium atom (Na) with a molar mass of 22.99 g/mol and one chlorine atom (Cl) with a molar mass of 35.45 g/mol. Adding these values gives:
Molar mass of NaCl = 22.99 g/mol + 35.45 g/mol = 58.44 g/mol
2. Calculate the molar mass of KCl (potassium chloride):
KCl has one potassium atom (K) with a molar mass of 39.10 g/mol and one chlorine atom (Cl) with a molar mass of 35.45 g/mol. Adding these values gives:
Molar mass of KCl = 39.10 g/mol + 35.45 g/mol = 74.55 g/mol
3. Calculate the molar mass of CaCl2 (calcium chloride):
CaCl2 has one calcium atom (Ca) with a molar mass of 40.08 g/mol and two chlorine atoms (Cl) with a molar mass of 35.45 g/mol each. Adding these values gives:
Molar mass of CaCl2 = 40.08 g/mol + 35.45 g/mol + 35.45 g/mol = 110.98 g/mol
Now that we have the molar masses of each substance, we can calculate the mass of each solution using the given volume (100 ml) and molarity (1.0 M):
Mass of NaCl solution = Molar mass of NaCl × Volume of NaCl solution
= 58.44 g/mol × 0.1 L (converting 100 ml to 0.1 L)
= 5.844 g
Mass of KCl solution = Molar mass of KCl × Volume of KCl solution
= 74.55 g/mol × 0.1 L
= 7.455 g
Mass of CaCl2 solution = Molar mass of CaCl2 × Volume of CaCl2 solution
= 110.98 g/mol × 0.1 L
= 11.098 g
After calculating the masses of each solution, we find that the solution with CaCl2 will have the largest mass, weighing approximately 11.098 grams.