How many grams are in 0.75 L of a 2% (w/v) solution?

How many grams are in 0.75 L of a 2% (w/v) solution?

• A. 5 g
• B. 10 g
• C. 15 g
• D. 20 g

Answer: (C)

To determine how many grams are in 0.75 L of a 2% (w/v) solution, it's essential to understand what a 2% (w/v) solution represents. A 2% (w/v) solution means there are 2 grams of solute per 100 mL of solution. First, convert the volume from liters to milliliters since the percentage is expressed per 100 mL. 0.75 L equals 750 mL (since 1 L = 1000 mL). Next, calculate how many grams of solute are in 750 mL using the ratio of the 2% solution: - For every 100 mL, there are 2 grams. To find the amount for 750 mL: \[ \text{Grams} = \left(\frac{2 \text{ g}}{100 \text{ mL}}\right) \times 750 \text{ mL} \] Now, calculate it: \[ \text{Grams} = 2 \times 7.5 = 15 \text{ g} \] This calculation shows that there are 15 grams in 0.75 L of a

To determine how many grams are in 0.75 L of a 2% (w/v) solution, it's essential to understand what a 2% (w/v) solution represents. A 2% (w/v) solution means there are 2 grams of solute per 100 mL of solution.

First, convert the volume from liters to milliliters since the percentage is expressed per 100 mL.

0.75 L equals 750 mL (since 1 L = 1000 mL).

Next, calculate how many grams of solute are in 750 mL using the ratio of the 2% solution:

• For every 100 mL, there are 2 grams.

To find the amount for 750 mL:

[

\text{Grams} = \left(\frac{2 \text{ g}}{100 \text{ mL}}\right) \times 750 \text{ mL}

]

Now, calculate it:

[

\text{Grams} = 2 \times 7.5 = 15 \text{ g}

]

This calculation shows that there are 15 grams in 0.75 L of a