Question

A chemist needs 35.0 g of concentrated sulfuric acid for an experiment. The density of concentrated sulfuric acid at room temperature is 1.84 g/mL. What volume of the acid is required?

Answer 1

We use the defining quotient....`rho_"density"="mass"/"volume"`

Explanation:

And thus the volume is given by the quotient....

`"volume"="mass"/rho_"density"`

And we fill in some dimensional numbers....

`"volume"=(35.0*cancelg)/(1.84*cancelg*mL^-1)=??*mL`..

Note that this is consistent dimensionally, because `1/(mL^-1)=1/(1/(mL))=mL` as required.....

I forgot to stress that when you do the dilution, you add the acid to the water, and never the water to the acid. Why? Because if you spit in acid it spits back.... This is a very important practical tip,