an order is written for 500ml 12%solution. i have a 205 solution in stock.
how much stock solution and how much diluent are needed to compound this order
my answer is
300ml solution of and 200 diluent
Your answer is incorrect.
To calculate the amount of stock solution and diluent needed to compound this order, we can use the following equation:
stock solution volume x stock solution concentration + diluent volume x 0 = final volume x final concentration
Where:
- Stock solution volume = x (what we need to find)
- Stock solution concentration = 20.5% (given)
- Diluent volume = y (what we need to find)
- Final volume = 500 ml (given)
- Final concentration = 12%
Substituting the values in the equation, we get:
x(20.5%) + y(0%) = 500 ml (12%)
0.205x = 60
x = 292.68 ml (rounded to 293 ml)
Therefore, we need 293 ml of the 20.5% stock solution and 207 ml of diluent to compound this order.