How many grams of NaOH are present in 9.0 mL of a 8.0% (m/v) NaOH solution
To calculate the number of grams of NaOH in a solution, we need to consider the percentage concentration and volume of the solution.
Step 1: Convert the percentage concentration to a decimal.
To convert 8.0% to a decimal, divide it by 100:
8.0% / 100 = 0.08
Step 2: Calculate the mass of NaOH in the solution.
The mass of the solute (NaOH) can be calculated using the formula:
Mass (g) = Volume (mL) × Concentration (g/mL)
In this case, the volume is given as 9.0 mL and the concentration is 0.08 g/mL (since 8.0% (m/v) means 8.0 g of NaOH in 100 mL of solution).
Mass (g) = 9.0 mL × 0.08 g/mL = 0.72 grams
Therefore, there are 0.72 grams of NaOH present in 9.0 mL of a 8.0% (m/v) NaOH solution.