superhubert
Member
does anyone know what w/w and v/w means as a unit? iknow ppm is the same as mg/kg.
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w/w and v/w (1 Viewer)
- Thread starter superhubert
- Start date
I've always thought it was w/v and not v/w. ie. 'weight per volume'.
w/w means "weight per weight" and both w/w and w/v are percentage units. So if asked to give the concentration in w/w, you would state the mass of the required substance in 100g of the overall substance. Similarly, if asked for w/v, you would calculate moles of the required substance from the molar proportions of the substances in the solution, then convert this to a mass using n=m/MM, and then convert this mass over your total volume of solution into a mass per 100mL of the solution.
w/w means "weight per weight" and both w/w and w/v are percentage units. So if asked to give the concentration in w/w, you would state the mass of the required substance in 100g of the overall substance. Similarly, if asked for w/v, you would calculate moles of the required substance from the molar proportions of the substances in the solution, then convert this to a mass using n=m/MM, and then convert this mass over your total volume of solution into a mass per 100mL of the solution.
superhubert
Member
ahhhhhhhhhh