Question

What is the concentration (M) of a solution containing 29 grams of salt (NaCl) dissolved in 0.4 Liters of water?

Round your answer to the nearest hundredth (2 decimal places). Do NOT include units.

Answer 1

To calculate the concentration (M) of a solution, we need to divide the number of moles of solute by the volume of the solution in liters.

First, we need to convert the mass of NaCl to moles. The molar mass of NaCl is 58.44 g/mol.

Number of moles of NaCl = mass of NaCl / molar mass of NaCl

Number of moles of NaCl = 29 g / 58.44 g/mol

Number of moles of NaCl = 0.496 moles

Next, we divide the number of moles of NaCl by the volume of the solution in liters.

Concentration of NaCl (M) = number of moles of NaCl / volume of solution in liters

Concentration of NaCl (M) = 0.496 moles / 0.4 L

Concentration of NaCl (M) = 1.24 M

Rounding to the nearest hundredth, the concentration of the solution is 1.24 M.