15g of potassium chloride is diluted in 2L of sterile water for injection. What is the final perccent strength (w/v)? ____
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To calculate the final percent strength (w/v) of a solution, you need to divide the weight (in grams) of the solute by the volume (in milliliters) of the solution and then multiply by 100.
In this case, you have 15 grams of potassium chloride and it is diluted in 2000 milliliters (2 liters) of water.
First, convert liters to milliliters:
2 liters = 2,000 milliliters
Now, calculate the percent strength (w/v) using the following formula:
Percent strength (w/v) = (weight of solute / volume of solution) x 100
Percent strength (w/v) = (15g / 2000ml) x 100
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%.