# Chemical Forums

## Chemistry Forums for Students => High School Chemistry Forum => Topic started by: kamehamehaaa on September 24, 2006, 10:33:11 PM

Title: Calculating Mass
Post by: kamehamehaaa on September 24, 2006, 10:33:11 PM
Hello can someone help me calculate the mass of Cu(NO3)23H2O needed to prepare 50.0mL of a .50 M Cu(II) solution?

I would appreciate it if you can help me through this problem by telling me what I should do rather than give me the answer.

Thanks
Title: Re: Calculating Mass
Post by: Bakegaku on September 24, 2006, 10:48:17 PM
Do you know how to figure out what the molar mass of Cu(NO3)2*3H2O is?
Title: Re: Calculating Mass
Post by: kamehamehaaa on September 24, 2006, 11:07:23 PM
Yeah I got the molar mass to be 241.599 grams, but I don't know how to set it up from there.
Title: Re: Calculating Mass
Post by: BaO on September 25, 2006, 01:56:05 AM
i'm not sure if i'm right :-\ . but i think first of all , you would have to write a balanced chemical equation .from that you can figure it out. i think so. :P
Title: Re: Calculating Mass
Post by: Borek on September 25, 2006, 02:27:51 AM
Yeah I got the molar mass to be 241.599 grams, but I don't know how to set it up from there.

How would you go from here in the case of Cu(NO3)2?
Title: Re: Calculating Mass
Post by: Mitch on September 25, 2006, 03:43:45 AM
The molar mass would be 241.599 g/mol
Title: Re: Calculating Mass
Post by: Bakegaku on September 25, 2006, 07:30:48 AM
Quote
Yeah I got the molar mass to be 241.599 grams, but I don't know how to set it up from there.

When Copper (II) Nitrate dissolves, how many moles of Cu2+ are released per mole of Cu(NO3)2?