How would you prepare a solution of about 8mg/100ml of ascorbic acid in water (25ml)?
would it make sense to use 2mg and dissove it in 25 ml water?
I'm not sure if they mean to use that ratio but in a 25 ml solution.
To prepare a solution of 8mg/100ml of ascorbic acid in water, you will need to follow these steps:
Step 1: Calculate the amount of ascorbic acid needed:
Since we want to prepare a 25ml solution with a concentration of 8mg/100ml, we need to calculate the amount of ascorbic acid required.
The given concentration is 8mg/100ml, which means for every 100ml of solution, we need 8mg of ascorbic acid. To find the amount required for 25ml, we can set up a proportion:
(8mg / 100ml) = (x mg / 25ml)
Simplifying this equation, we can cross-multiply and solve for x:
x = (8mg * 25ml) / 100ml
= 2mg
Therefore, you will need 2mg of ascorbic acid for a 25ml solution.
Step 2: Dissolve the ascorbic acid in water:
Once you have measured out 2mg of ascorbic acid, you can now dissolve it in 25ml of water. Make sure to use a measuring balance or scale to accurately measure the amount.
Add the ascorbic acid to the water slowly, stirring gently to aid in the dissolution process. Keep stirring until the ascorbic acid is completely dissolved.
Step 3: Final verification:
Once the ascorbic acid is dissolved, you should verify the concentration of the solution. You can do this by using a spectrophotometer or titration method to determine the exact concentration of ascorbic acid in the solution. This step helps ensure the accuracy of your solution preparation.
Note:
Always wear appropriate safety equipment, such as gloves and goggles, when handling chemicals. Follow any additional safety precautions recommended by your laboratory or institution.