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Old 01-23-2012, 12:05 AM   #1
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Ok someone please help me confirm my math? I have no one to here to double check it for me.

A 0.5% salt content is:
4.21lbs per 100 gallons
1.9kg or 1909grams per 378.5L
8.4 x 45 = 378L
So 1909 divided by 8.4 = 227g per 45L of water to get 0.5%
227 divided by 5 will = 45.4g or 0.1% of salt.
45.4g x 3 = 136.2g of salt for a 0.3% solution in 45L of water.

IS THIS CORRECT???

(oops spelling mistake in title!)
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Old 01-25-2012, 06:38 PM   #2
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I sure wish I could cofirm for you, but I have no clue!
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Old 01-26-2012, 12:19 AM   #3
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Quote:
Originally Posted by Mumma.of.two
Ok someone please help me confirm my math? I have no one to here to double check it for me.

A 0.5% salt content is:
4.21lbs per 100 gallons
1.9kg or 1909grams per 378.5L
8.4 x 45 = 378L
So 1909 divided by 8.4 = 227g per 45L of water to get 0.5%
227 divided by 5 will = 45.4g or 0.1% of salt.
45.4g x 3 = 136.2g of salt for a 0.3% solution in 45L of water.

IS THIS CORRECT???

(oops spelling mistake in title!)
Sounds good to me good job!
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Old 01-26-2012, 12:20 AM   #4
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Haha thanks.
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Old 01-26-2012, 12:23 AM   #5
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Anytime
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Old 01-26-2012, 04:28 AM   #6
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Yes, but you took an absolutely painful way of getting there, and some of it didn't make a lot of sense.


The metric system beats the pants off the imperial system in matters like this. Rather than bothing with lbs to g to lbs to g, simply remember that the .3% means that for every 1000g or something, there are 3 g of something else. Since 1L = 1 kg, this becomes incredibly simple:

45L = 45 kg
45.4kg * .003 (3% in decimal)= .1362kg = 136.2g

Easy peezy.
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Old 01-26-2012, 04:32 AM   #7
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Quote:
Originally Posted by aqua_chem
Yes, but you took an absolutely painful way of getting there, and some of it didn't make a lot of sense.

The metric system beats the pants off the imperial system in matters like this. Rather than bothing with lbs to g to lbs to g, simply remember that the .3% means that for every 1000g or something, there are 3 g of something else. Since 1L = 1 kg, this becomes incredibly simple:

45L = 45 kg
45.4kg * .003 (3% in decimal)= .1362kg = 136.2g

Easy peezy.
Very painful! Lol
I got informed of the easy way after I posted this...... don't I feel like a goof.
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Old 01-26-2012, 12:31 PM   #8
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After reading all this I'm feeling like a goof myself!! Um......either of u wanna help me with my taxes lol jk
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