"Use a 10% w/v nitric acid solution."
How to prepare 10% w/v nitric acid solution?
Do I just weigh 10g of conc nitric acid (65%) and dilute to 100ml with water?
Use this formula
C1V1=C2V2
65(x)=10(100)
x=10(100)/65=15.38 ml of 65% nitric acid dilute to 100 ml to get 10% nitric acid
yes
That is correct! To prepare a 10% w/v nitric acid solution using a 65% nitric acid concentrate, you would measure out 15.38 mL of the concentrate and dilute with enough water to make a total volume of 100 mL.
To prepare a 10% w/v (weight/volume) nitric acid solution, you would require a slight adjustment to the method you mentioned. Here's how you can prepare it:
Step 1: Determine the amount of nitric acid needed.
Since you want a 10% w/v solution, it means you want 10 grams of nitric acid per 100 milliliters of solution.
Step 2: Check the concentration of your nitric acid stock solution.
You mentioned you have a concentrated nitric acid solution with a concentration of 65%. This concentration indicates that there are 65 grams of nitric acid dissolved in every 100 milliliters of solution.
Step 3: Calculate the volume of the stock solution required.
To calculate the volume of the stock solution needed to obtain 10 grams of nitric acid, you can use the following formula:
Volume of stock solution (ml) = (desired mass of nitric acid (g) / concentration of stock solution (%)) * 100
In this case, it would be:
Volume of stock solution (ml) = (10g / 65%) * 100 = 15.38 ml
So, you would need approximately 15.38 milliliters of the concentrated nitric acid solution.
Step 4: Dilute the stock solution to make the final solution.
Take a clean container such as a beaker or a flask and measure out 15.38 milliliters of the concentrated nitric acid solution using a measuring cylinder or a pipette. Then add water to the container gradually, while stirring, until the total volume reaches 100 milliliters. Make sure the solution is well-mixed.
By following these steps, you will have successfully prepared a 10% w/v nitric acid solution. Remember to exercise caution and wear appropriate safety equipment, such as gloves and goggles, when working with nitric acid or any other hazardous chemicals.