If you need to dissolve 70 g of a drug in 1400 mL of solution, what is the percent strength of the solution?

To determine the percent strength of a solution, you can use the formula for percent concentration, which is based on the mass of the solute divided by the total volume of the solution, multiplied by 100.

In this case, you have 70 grams of a drug (the solute) dissolved in 1400 mL of solution. To calculate the percent strength, you first convert the volume from milliliters to liters since percent concentration is often expressed in grams per liter. However, since we're calculating a solution where milliliters are involved, we can directly use the volume in milliliters for our calculations.

The formula is:

[ \text{Percent Strength} = \left( \frac{\text{mass of solute (g)}}{\text{volume of solution (mL)}} \right) \times 100 ]

Substituting the figures from the question into the formula gives:

[ \text{Percent Strength} = \left( \frac{70 \text{ g}}{1400 \text{ mL}} \right) \times 100 ]

Calculating this yields:

[ \frac{70}{1400} = 0.05 ]

Now, multiply by 100 to