how to prepare 20% of Nitric acid from 70% of the Nitric acid solution
Is this 70% and 20% w/w or v/v. or v/v and how much do you need to prepare?
To prepare a 20% Nitric acid solution from a 70% Nitric acid solution, you will need to dilute the 70% solution with water. The amount of water and 70% Nitric acid solution to be mixed will depend on the volume of the final desired solution.
Here's a step-by-step process to prepare the 20% Nitric acid solution:
1. Determine the volume of the final solution you want to make. Let's assume you want to make 1 liter (1000 mL) of the 20% Nitric acid solution.
2. Using a proportion, calculate the volume of the 70% Nitric acid solution required. The proportion can be set up as follows:
(Volume of 70% Nitric acid solution) / (Volume of final solution) = (Desired concentration of Nitric acid) / (Concentration of 70% Nitric acid solution)
Substituting the values: (Volume of 70% Nitric acid solution) / 1000 mL = 20% / 70%
Solving for the volume of 70% Nitric acid solution, we get: (Volume of 70% Nitric acid solution) = (20% / 70%) * 1000 mL
3. Calculate the volume of water needed by subtracting the volume of the 70% Nitric acid solution from the volume of the final solution. In this case, it would be: (1000 mL) - (Volume of 70% Nitric acid solution)
4. Measure out the calculated volume of 70% Nitric acid solution using a graduated cylinder or any other suitable measuring instrument.
5. Add the measured volume of 70% Nitric acid solution to a clean container.
6. Measure out the calculated volume of water using another measuring instrument.
7. Slowly add the measured volume of water to the container containing the 70% Nitric acid solution while stirring gently. It's important to add the water to the acid slowly to prevent a violent reaction.
8. Continue stirring until the water and acid are thoroughly mixed.
9. Once the mixture is uniformly mixed, your 20% Nitric acid solution is ready to use.
Please note that Nitric acid is highly corrosive and can be dangerous. Ensure you handle it with care, wear appropriate protective gear, and work in a well-ventilated area.