Final answer:
Without additional information about the concentration of KCl in the solution, it is impossible to determine how many grams of KCl are in 20.3g of the solution. The mass of KCl can be calculated if the molarity and volume of the solution are provided. The correct answer option is B .
Step-by-step explanation:
The question, "Determine the amount in grams of KCl that exists in 20.3g of a solution," cannot be answered without additional information about the concentration of the solution. The molarity of a solution is the number of moles of solute per liter of solution. To find the mass of KCl, one would need to know the molar concentration (molarity) of KCl in the solution. As an example, if the molarity of KCl is given, the calculation would involve multiplying the volume of the solution by the molarity to find the moles of KCl, and then converting moles to grams using the molar mass of KCl.
To further illustrate this, if we have the molarity of a KCl solution and the volume of the solution, we can calculate the mass of KCl in the solution as follows:
- Determine the number of moles of KCl by multiplying the molarity (moles/L) by the volume of the solution (L).
- Calculate the mass of KCl by multiplying the number of moles by the molar mass of KCl (74.55 g/mol).
Without additional information about the concentration of KCl in the solution, it is impossible to determine how many grams of KCl are in 20.3g of the solution. The mass of KCl can be calculated if the molarity and volume of the solution are provided.