Help! Simple Mole calculation... (2 Viewers)

[kloudsurfer]

Hey,

I know this is simple but im just not sure if i am doing it right. Could someone please help me with it?

The question is: 'Determine the amount of oxalic acid (H2C2O4) needed to make 250 ml of 0.1 mol/L.'

I dunno if my method is right, heres what ive done:

n=c x V
=0.1 x 0.25 (do i need to convert this into litres?)
=0.025

m=nxM
= 0.025(2x12.01+2x1.008+4x16)
= 2.2509 (what units is this? grams? I thought it is kilos because i used litres before...but that doesnt make sense...im so confused!!)

Any help woudl be appreciated. Thanks!

 

[Aerlinn]

Yeah, what you're doing is right. The mass is in grams. Though when it asks 'determine the amount', I'd usually interpret it as 'find the number of mole'.

 

[kloudsurfer]

Yeah, what you're doing is right. The mass is in grams. Though when it asks 'determine the amount', I'd usually interpret it as 'find the number of mole'.

Thanks so much! I was away when we were doing all this stuff so I was trying to do it myself but i was a bit unsure!

and yeah, it is the amount, because its for a titration

Thanks!