# simple volumetric calculationsWatch

#1
what isthe molarity of 85g of silver nitrate AgNO3, IN 250CM^3 of solution
0

4 years ago
#2
molarity is measured in moles per dm3 so therefore you are finding out the concentration.
the eqution for concentration is
concentration= moles/volume(dm3)
we need to find out the values of moles and volume in dm3 and then put in these values back into the equation to get your answer

volume= 0.25dm3 because 1 dm3 there is 1000cm3
moles is found by using the equation
moles=mass/Mr(molecular mass)
therefore
moles=85/170=0.5 moles

put these two values back into the equation
concentration=0.5/0.25=2 mol/dm3
therefore the molarity is 2 mol/dm3
0
#3
(Original post by the traveller)
molarity is measured in moles per dm3 so therefore you are finding out the concentration.
the eqution for concentration is
concentration= moles/volume(dm3)
we need to find out the values of moles and volume in dm3 and then put in these values back into the equation to get your answer

volume= 0.25dm3 because 1 dm3 there is 1000cm3
moles is found by using the equation
moles=mass/Mr(molecular mass)
therefore
moles=85/170=0.5 moles

put these two values back into the equation
concentration=0.5/0.25=2 mol/dm3
therefore the molarity is 2 mol/dm3
thanks alot that really helped
0
X

new posts
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

### University open days

• Cranfield University
Cranfield Forensic MSc Programme Open Day Postgraduate
Thu, 25 Apr '19
• University of the Arts London
Open day: MA Footwear and MA Fashion Artefact Postgraduate
Thu, 25 Apr '19
• Cardiff Metropolitan University
Sat, 27 Apr '19

### Poll

Join the discussion

#### Have you registered to vote?

Yes! (125)
39.06%
No - but I will (17)
5.31%
No - I don't want to (20)
6.25%
No - I can't vote (<18, not in UK, etc) (158)
49.38%