SUMMARY
To prepare a 0.5M NaCl solution in 500mL of water, one must dissolve 29.25 grams of NaCl, calculated using its molecular weight of 58.5 g/mol. The conversion from volume to moles is critical, as 0.5M indicates 0.5 moles of NaCl per liter of solution. Therefore, for 0.5L, the correct amount of NaCl is determined by the equation: 0.5 moles x 58.5 g/mol = 29.25 grams. It is essential to understand that the number of moles of NaCl is dependent on the volume of the solution, not the amount of water alone.
PREREQUISITES
- Understanding of molarity and its calculations
- Knowledge of molecular weight and its application in solution preparation
- Basic arithmetic for unit conversions (liters to milliliters)
- Familiarity with the concept of moles in chemistry
NEXT STEPS
- Study the calculation of molarity and how it relates to solution preparation
- Learn about the concept of dilution and concentration in chemistry
- Explore the relationship between moles, mass, and volume in chemical solutions
- Investigate common laboratory practices for preparing solutions accurately
USEFUL FOR
Chemistry students, laboratory technicians, and anyone involved in preparing chemical solutions will benefit from this discussion.