Question

can someone explain to me how to do this:
21.25cm^3 of solution of HNO3 containing 6.25g HNO3. Find the Mass Concentration of the solution

Answer 1

mass concentration (gama) is:
gama = m(HNO3) / V(solution)

Answer 2

i dont understand that

Answer 3

would it just be worked out in one step? same as how molar concentration is calculated only difference is the quantities being calculated. right??

Answer 4

mass concentration is mass of HNO3 divided with volume of solution---

Answer 5

okay

Answer 6

the formula i was given is molar concentration times molar mass

Answer 7

you need to get units in g/dm3 so you would get mass concentration by multiplying molar concentration mol dm-3 with molar mass g mol-1 -> g/dm3

Answer 8

so the formula wrong then?

Answer 9

no why would it be wrong. you can come to one solution by multiple ways...

Answer 10

oh okay

Answer 11

okay i finally got it now( i hope) XD

Answer 12

so there is two ways of finding mass concentration then?

Answer 13

1) the mass over volume
2) molar concentration times the molar mass

?????????????????

Answer 14

yes!

Answer 15

depending on data you have!

Answer 16

okay then

Answer 17

thanks for clearing the fog

Answer 18

not a problem