How many grams of KI are in 25.0 ml of a 3.0% (m/v) solution?
To determine the number of grams of KI in a 3.0% (m/v) solution, we need to use the formula:
Mass (g) = Volume (ml) × Concentration (% m/v) / 100
In this case, the volume is given as 25.0 ml, and the concentration is 3.0% (m/v). Plugging in these values into the formula, we get:
Mass (g) = 25.0 ml × 3.0% / 100
Now let's solve the equation step by step:
1. Convert the concentration from percentage to decimal: 3.0% = 3.0 / 100 = 0.03.
2. Substitute the values into the equation: Mass (g) = 25.0 ml × 0.03.
3. Multiply the volume in milliliters by the concentration: Mass (g) = 0.75 g.
Therefore, there are 0.75 grams of KI in 25.0 ml of a 3.0% (m/v) solution.