What will be the amount of malathion 50 EC required to prepare 100 liters of 0.05% spray material –

Correct option is A

The amount of malathion 50 EC required to prepare 100 liters of 0.05% spray material.
· Total volume of spray material: 100 liters
· Desired concentration of spray material: 0.05%
· Concentration of malathion 50 EC: 50%
  Now,
Calculate the required amount of active ingredient and then adjust for the concentration of the malathion solution.
Step 1
Calculate the required amount of active ingredient.
· The required amount of active ingredient is the desired concentration multiplied by the total volume.

Step 2
Convert liters to milliliters.

Step 3
Adjust for the concentration of malathion 50 EC.
· Since malathion 50 EC is active ingredient, divide the required amount of active ingredient by 50% to find the total amount of malathion 50 EC needed.