Describe how you would prepare 500 ml of a solution that is 40% bleach solution by volume.
If by volume you mean mass/volume, you take 40 g bleach and add to to water to make 100 mL solution. Of course that's for 100 mL solution so you multiply everything by 5 to obtain 500 mL. If you have pure bleach and you mean volume/volume, take 200 mL bleach and make to 500 mL
To prepare a 500 ml solution that is 40% bleach solution by volume, you would need to take the following steps:
Step 1: Determine the amount of bleach needed
To calculate the amount of bleach needed, we need to convert the desired 40% concentration into a decimal. Since 40% is equivalent to 0.40 in decimal form, we can calculate the required amount of bleach by multiplying the desired concentration by the total volume of the solution.
Bleach needed = 0.40 * 500 ml = 200 ml
Step 2: Measure the bleach
Using a measuring cylinder or graduated pipette, accurately measure 200 ml of bleach. It is important to ensure precise measurements to achieve the desired concentration.
Step 3: Add enough water to achieve the desired volume
To complete the solution, add enough water to make a total volume of 500 ml. This means adding (500 ml - 200 ml) = 300 ml of water to the bleach.
Step 4: Mix thoroughly
Use a stirring rod or a gentle swirling motion to mix the bleach and water until they are well combined.
Note: Always start by adding the bleach to the water rather than the other way around, as this prevents the bleach from splashing or creating hazardous fumes.