How many kg of seawater would have to be processed to obtain

dieggo

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Sep 3, 2006
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I am provided with this information:

. . .Constituent. . .g/kg in seawater

. . . ..Boron. . . . . . . . . . .0.004

Question: How many kilograms (kg) of seawater would have to be processed to obtain 1 kg of boron?

My answer: I multiplied 0.004 * 1000 and got and answer of "4 kgs"

Is that right? Thank you!
 
Are you saying that there are 0.004 gm of Boron for every kg of seawater?

That would mean 4 kg seawater would yield 0.016 gm of Boron.

I think you're nowhere close -- orders of magnitude short, in fact.

Clarify your concentration and we can talk.
 
You're getting closer. That's how much is required to get 1 gm of Boron.

Quit guessing. Write it down and figure it out.

\(\displaystyle \L\,\frac{1\,kg\,seawater}{0.004\,gm\,Boron}*\frac{1000\,gm}{1\,kg}\)
 
Thank you tkhunny, I wrote it down as you told me and I got 250.000 kgs, is that right?

And sorry to continue asking for your help, just one last question

first they give me these data

Constituent g/kg/ in seawater
Sodium 10.76

and ask me

If fresh watter is added tp seawater (salinity 35%) and the salinity of seawater is reduced to 30% what is the sodium ion concentration?

please could you give me any hint, i don't know what formule to use

thank you so much.
 
dieggo said:
Thank you tkhunny, I wrote it down as you told me and I got 250.000 kgs, is that right?
Since you left no profile information, I will have to conclude that you are nto in the U.S. If you ARE, then you have a units problem. Quiz!! Why would that make a difference.

On the other one, generally we would expect a new thread with a new problem. As it is, I have one question on it. Is SALT the ONLY provider of sodium in the seawater? If not, we have a problem.
 
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