a pharmacy tech adds 10ml of a stock solution into 200ml of water.
what is the percent v/v
my answer is 5%
need help with the formula
The percent v/v formula is:
(percent volume/volume) = (volume of solute / volume of solution) x 100%
In this case, the volume of solute (the stock solution) is 10ml, and the volume of solution is 10ml + 200ml = 210ml. So:
(percent volume/volume) = (10ml / 210ml) x 100%
(percent volume/volume) = 0.0476 x 100%
(percent volume/volume) = 4.76%
Therefore, the percent v/v is approximately 4.76%, not 5%.
To calculate the percent v/v (volume/volume) concentration, you would use the following formula:
Percent v/v = (Volume of solute / Volume of solution) × 100
In this case, the volume of solute (stock solution) is 10 mL, and the volume of the solution (water + stock solution) is 200 mL.
Percent v/v = (10 mL / 200 mL) × 100
Percent v/v = 0.05 × 100
Percent v/v = 5%
So, your answer of 5% is correct!
To calculate the percent volume/volume (% v/v) of a solution, you need to know the volume of the solute (stock solution) and the final volume of the solution (including both the solute and solvent).
In the given scenario, the pharmacy tech added 10 mL of the stock solution to 200 mL of water. To find the percent v/v, you can use the following formula:
% v/v = (Volume of Solute / Volume of Solution) x 100
Now, substitute the given values into the formula:
% v/v = (10 mL / (10 mL + 200 mL)) x 100
Simplifying this equation:
% v/v = (10 mL / 210 mL) x 100
% v/v ≈ 4.76%
Therefore, the percent v/v of the solution is approximately 4.76%, not 5%.