A chemistry student is given a sample of a solution containing a known amount of sodium chloride (NaCl) dissolved in water. The student needs to determine the concentration of the NaCl in the solution, using mass balance calculations. The student has access to a balance and other necessary laboratory equipment. What is the concentration of NaCl in the solution given to the student? How much NaCl is present in the solution, and how much water was used to dissolve it?

Question

A chemistry student is given a sample of a solution containing a known amount of sodium chloride (NaCl) dissolved in water. The student needs to determine the concentration of the NaCl in the solution, using mass balance calculations. The student has access to a balance and other necessary laboratory equipment. What is the concentration of NaCl in the solution given to the student? How much NaCl

Answer 1

To determine the concentration of NaCl in the solution, we need more information about the mass of NaCl and the volume of water used to dissolve it. However, I can guide you through the process of how to calculate the concentration once you have the necessary information.1. Weigh the mass of NaCl: Using a balance, the student should weigh the mass of NaCl present in the solution. Let's assume the mass of NaCl is m grams.2. Measure the volume of water: The student should measure the volume of water used to dissolve the NaCl. Let's assume the volume of water is V milliliters  mL .3. Convert the volume of water to liters: To calculate the concentration, we need the volume in liters  L . To convert mL to L, divide the volume by 1000. So, V_L = V/1000.4. Calculate the concentration of NaCl: The concentration of a solution is typically expressed in moles per liter  M or mol/L . To find the concentration of NaCl, we need to first find the moles of NaCl present in the solution.The molar mass of NaCl is 58.44 g/mol  22.99 g/mol for Na and 35.45 g/mol for Cl . To find the moles of NaCl, divide the mass of NaCl  m  by its molar mass:moles of NaCl = m / 58.44Now, we can calculate the concentration of NaCl in the solution:Concentration  M  = moles of NaCl / V_LOnce you have the mass of NaCl and the volume of water, you can use these steps to calculate the concentration of NaCl in the solution.