Final answer:
The concentration of potassium bromide in a 1.33 L solution, with 5.95 g of KBr dissolved, is calculated to be 0.0376 M. This is done by first determining the number of moles of KBr, then dividing by the volume of the solution.
Step-by-step explanation:
To calculate the concentration of potassium bromide (KBr) in a solution with a volume of 1.33 liters, you can use the formula for molarity, which is moles of solute divided by liters of solution. First, you need to find the number of moles of KBr using its molar mass, which can be found on a periodic table.
The molar mass of KBr is 119.0 g/mole, and with 5.95 g of KBr dissolved:
Now, divide the moles of KBr by the volume of the solution in liters to get the molarity
Therefore, the concentration of potassium bromide in the solution is 0.0376 M.
Think about your result
It's always important to reflect on your results to ensure they make sense. In this case, the volume of the solution increased to 1.33 L from the initial 400 cm³, assuming no significant change in volume upon dissolving the KBr. Hence, the concentration obtained should be reasonable given the amount of solute and resultant volume.