what is the concentration of a solution with 5 grams of HBr dissolved in 2 liters of water?
moles = grams/molar mass. Solve for moles, then M = moles/L
To calculate the concentration of a solution, you need to know the amount of solute (in this case, 5 grams of HBr) and the volume of the solution (in this case, 2 liters of water). The concentration can be expressed in various units, such as molar concentration (moles per liter), weight/volume concentration (grams per liter), or percentage concentration.
In this case, we can calculate the weight/volume concentration. It is the ratio of the weight of the solute to the volume of the solution.
To find the concentration:
1. Convert the weight of the solute from grams to liters by dividing it by the density of the solute. In this case, HBr is dissolved in water, and the density of water is 1 g/mL. Therefore, the weight of the solute (5 grams) is equal to 5 mL.
2. Add the volume of water (2 liters) to the volume of the solute (5 mL) to get the final volume of the solution, which is 2005 mL or 2.005 liters.
3. Divide the weight of the solute (5 grams) by the volume of the solution (2.005 liters) to get the weight/volume concentration. In this case, it is approximately 2.49 grams per liter (g/L).
Therefore, the concentration of the solution with 5 grams of HBr dissolved in 2 liters of water is approximately 2.49 grams per liter (g/L).