sarah1004 Posts: 107, Reputation: 1 Junior Member #1 Nov 2, 2009, 09:42 AM
What are concentrations of species in 0.04M sodium sulfate in water?
I am confusing on this problems.

Thanks
 Unknown008 Posts: 8,076, Reputation: 723 Uber Member #2 Nov 2, 2009, 09:51 AM

0.04 M means 0.04 moles of the compound in 1000 mL of water

0.5 M means 0.5 moles of compound in 1000 mL

Etc etc.

M is also moles per litre, so it makes xx moles in 1 litre, or in 1000 mL
 sarah1004 Posts: 107, Reputation: 1 Junior Member #3 Nov 2, 2009, 09:55 AM
so if I used L

its going to be 0.040mol/1000L=0.00004M?

Thanks
 Unknown008 Posts: 8,076, Reputation: 723 Uber Member #4 Nov 2, 2009, 09:59 AM

Oh no! You missed my point!

It's 0.04 moles in 1 litre, which means 0.04 moles in 1000 mL, since 1L = 1000mL
 Unknown008 Posts: 8,076, Reputation: 723 Uber Member #5 Nov 2, 2009, 10:01 AM
Now the one you posted, 0.04 mol/1000L yes, that would make 0.00004M
 sarah1004 Posts: 107, Reputation: 1 Junior Member #6 Nov 2, 2009, 10:02 AM
so 0.040mol/1mL=0.04M
0.040mol/1000L=0.00004M

sorry :o
 Unknown008 Posts: 8,076, Reputation: 723 Uber Member #7 Nov 2, 2009, 10:06 AM

Lol!!

Ok, I think you better forget what I told you.

0.04 M = 0.04 mol in 1000 mL
1.0 M = 1 mol in 1000 mL
0.005 M = 0.005 moles in 1000 mL
 sarah1004 Posts: 107, Reputation: 1 Junior Member #8 Nov 2, 2009, 10:12 AM
so 0.040mol/1L=0.04M
0.040mol/1000mL=0.00004M
 Unknown008 Posts: 8,076, Reputation: 723 Uber Member #9 Nov 2, 2009, 10:15 AM

No, if you put 0.04 mol/1000 mL, you have 0.04 M
 sarah1004 Posts: 107, Reputation: 1 Junior Member #10 Nov 2, 2009, 10:18 AM
40mole/1000mL=0.04M

?
 Unknown008 Posts: 8,076, Reputation: 723 Uber Member #11 Nov 2, 2009, 10:22 AM

40 mole / 1000 mL = 40M

1L = 1000 mL

So, 0.04mol/L is the same thing as 0.04mol/1000mL and is the same thing as 0.04 M
 sarah1004 Posts: 107, Reputation: 1 Junior Member #12 Nov 8, 2009, 04:17 PM
So answer is just like 0.04mol/L and 0.04mol/1000mL , these?
 pramod awasthi Posts: 29, Reputation: -1 New Member #13 Nov 8, 2009, 11:08 PM
Originally Posted by sarah1004
I am confusing on this problems.

Thanks
OK I think I have not understand your question but just try
mlarity=gramwt*1000/molecular wt*volume (in litr)
but molarity given means somean concentration given want to know in gramm then ti will
.04*142=5.68 gm/L
 sarah1004 Posts: 107, Reputation: 1 Junior Member #14 Nov 8, 2009, 11:26 PM
On my book, it says only like" what are concentrations of species in 0.04M sodium sulfate in water? " this.. So that's why I was confusing..
 Unknown008 Posts: 8,076, Reputation: 723 Uber Member #15 Nov 9, 2009, 06:59 AM

Hmm, if the question looked for the concentration in grams per litre, then that would be right. But the question itself... I don't know what is it looking for exactly.

Or perhaps the concentration of each of the ions in the solution?
 sarah1004 Posts: 107, Reputation: 1 Junior Member #16 Nov 9, 2009, 07:17 PM
Yes 0.040moles is correct >.<

 Question Tools Search this Question Search this Question: Advanced Search

Check out some similar questions!

Sodium chloride and sodium [ 2 Answers ]

Can you help me to find four differences between sodium chloride and sodium . Thank you

Coke Concentrations! [ 1 Answers ]

In a diluted solution of coke(1.00mL of regular coke and diluted to the mark of a 25.00mL flask), the concentration of phosphate is 5.13 x 10^-5 mols/L. What is the concentration of phosphate in an original coke? What is the concentration of phosphoric acid in an original coke?

Concentrations of reactant molecules [ 1 Answers ]

When the concentrations of reactant molecules are increased, The rate of reaction increases. The best explanation for this Feature is the: a. frequency of molecular collisions increases. ...

Glucosamine sulfate [ 1 Answers ]

p;ease draw formula of glucosamine sulfate