Question

question 4 (3 points)
if 75 g of active ingredient powder is mixed with 400 ml ns solution, what is the final concentration? round to the nearest hundredths (w/v).

Explanation:

Step1: Recall w/v concentration formula

The weight/volume (w/v) concentration is calculated as $\frac{\text{weight of solute (g)}}{\text{volume of solution (mL)}} \times 100\%$.

Step2: Identify values

Here, weight of solute = 75 g, volume of solution = 400 mL.

Step3: Calculate concentration

Substitute values into the formula: $\frac{75}{400} \times 100\% = 0.1875\times 100\% = 18.75\%$ (rounded to nearest hundredths).

Answer:

The final concentration (w/v) is $18.75\%$