15g of potassium chloride is diluted in 2L of sterile water for injection. What is the final perccent strength (w/v)? ____
To calculate the final percent strength (w/v) of a solution, you would need to know the weight of the solute (in this case, the potassium chloride) and the volume of the solution.
Given:
- Weight of potassium chloride = 15g
- Volume of solution = 2L
To find the final percent strength (w/v), you can use the following formula:
Percent Strength (w/v) = (weight of solute / volume of solution) x 100
Substituting the given values into the formula:
Percent Strength (w/v) = (15g / 2L) x 100
First, we need to convert the volume of the solution into the same unit as the weight of the solute. Since 1L of water weighs approximately 1kg (1000g), the conversion would be:
2L x 1000g/L = 2000g
Now, substitute the converted values into the formula:
Percent Strength (w/v) = (15g / 2000g) x 100
Calculating:
Percent Strength (w/v) = 0.0075 x 100
Percent Strength (w/v) = 0.75%
Therefore, the final percent strength (w/v) of the solution is 0.75%.