Question

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?

Answer 1

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.