How to prepare 10% w/v nitric acid solution?
Do I just weigh 10g of concentrated nitric acid (65%) and dilute to 100ml with water?
No. No. No.
W/v the v is the volume of solution, not solute.
so you want this:
.10= massnitricacid/volumewater+volume acid.
Now the mass of acid is .65 the mass of the acid concentrate (or .35 water).
So lets some 10PC w/v.
Say we need V of this. So V=volume water+ volumeconcacid
but mass acid= .65*massconcacid.
but if you have the volume of concentrated acid, you need the density.
mass acid=.65*volumeconcacid*density
.10=massacidabove/(volumewater+volumeconcacid)
so if you want 100 ml of the final solution..
.10= .65*volumeacid*density/100
solve for ml of conc acid, then add the acid to water (100ml-volumeacid).
always add acid to water.
To prepare a 10% w/v (weight/volume) nitric acid solution, you can follow these steps:
1. Determine the amount of nitric acid needed: Since you want to make a 10% w/v solution, it means you want to dissolve 10 grams of nitric acid in a total volume of 100 ml (10 grams / 100 ml = 10% w/v).
2. Calculate the amount of concentrated nitric acid needed: Nitric acid is typically available in concentrated form, such as 65%. To calculate the amount needed, you can use the following formula:
Amount of concentrated nitric acid (in ml) = (Desired weight in grams / Concentration of nitric acid) * 100
For a 10% w/v nitric acid solution:
Amount of concentrated nitric acid = (10 grams / 65%) * 100 = 15.38 ml
Note: You should always round off to an appropriate number of significant figures based on the precision of your equipment.
3. Dilute the concentrated nitric acid: Take the calculated volume of concentrated nitric acid (15.38 ml) and transfer it to a container (graduated cylinder or beaker) labeled for liquids. Then, add distilled water slowly and carefully to make the total volume reach 100 ml. Remember to mix the solution gently to ensure proper mixing.
By following these steps, you should be able to prepare a 10% w/v nitric acid solution. Remember to always practice caution when handling concentrated acids, and ensure you have appropriate safety equipment such as gloves and goggles.