# The Naked Scientists Forum

### Author Topic: Specific gravity and concentration question  (Read 3827 times)

#### Uncle_Zhuge

• First timers
• Posts: 3
##### Specific gravity and concentration question
« on: 27/04/2010 11:40:58 »
Hi all, sorry that this maybe my first post but I will gladly appreciate if anyone could help me in this.

I have a powder A, 95% w/w in purity of active ingredient X.
1) I will like to make a 20% w/v solution B through powder A. How much do I need? What is the composition of active ingredient X in this solution B in w/w% and w/v%?
2) I will like to make a 20% w/w granule C through powder A. How much do I need? What is the composition of active ingredient X in this granule C in w/w % and w/v%?
Assume that the S.G. of solution B is 1.022 and granule C is 1.055. S.G. of active ingredient X and powder A are unknown.

Thanks in advance.

#### Uncle_Zhuge

• First timers
• Posts: 3
##### Specific gravity and concentration question
« Reply #1 on: 07/05/2010 04:48:56 »
Nobody knows the answer? Or is the question missing some important criteria?

#### Geezer

• Neilep Level Member
• Posts: 8328
• "Vive la résistance!"
##### Specific gravity and concentration question
« Reply #2 on: 07/05/2010 05:05:17 »
This wouldn't be a homework question by any chance?

#### Uncle_Zhuge

• First timers
• Posts: 3
##### Specific gravity and concentration question
« Reply #3 on: 07/05/2010 15:58:57 »
Nope, its not a homework question. That's why I will need answers from someone else as I have left my school for quite some time already...

#### lightarrow

• Neilep Level Member
• Posts: 4586
• Thanked: 7 times
##### Specific gravity and concentration question
« Reply #4 on: 08/05/2010 13:27:57 »
Nope, its not a homework question. That's why I will need answers from someone else as I have left my school for quite some time already...
If it's not a homework you clearly need it for a practical purpose. What is the active ingredient X? What are the powder A and the solution B? How did you make that solution?

#### The Naked Scientists Forum

##### Specific gravity and concentration question
« Reply #4 on: 08/05/2010 13:27:57 »

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