4 dkh for drop checker? - The Planted Tank Forum
 
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post #1 of 8 (permalink) Old 11-03-2014, 12:20 PM Thread Starter
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4 dkh for drop checker?

Hi
I want to make 4 dkh for dropcheker just a litle
I found this https://www.plantedtank.net/forums/sh...ad.php?t=42429
Can we change formule.3000 ml distilled water 3.6 g sb and......can we change them for example 50 ml distiled .6 gram dodiym bicarbonat??
Tnx

Last edited by Kavak; 11-03-2014 at 12:21 PM. Reason: A
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post #2 of 8 (permalink) Old 11-03-2014, 01:58 PM
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Your math doesn't work out. If you change to 50ml, you'd need to add .06g of NaHCO3. If you have a scale that sensitive, go for it.

or you can do 500ml with .6g of NaHCO3.

Last edited by mistergreen; 11-03-2014 at 02:13 PM. Reason: +
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post #3 of 8 (permalink) Old 11-04-2014, 06:38 AM Thread Starter
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r u sure 500 ml distiled with .6 Nahco3 will give me 40 dkh????
So y he used 3000ml when he could use 500 ml or ...?

Bump: Has it any formule or just by experiment?
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post #4 of 8 (permalink) Old 11-04-2014, 07:04 AM
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Quote:
Originally Posted by Kavak View Post
r u sure 500 ml distiled with .6 Nahco3 will give me 40 dkh????
So y he used 3000ml when he could use 500 ml or ...?

Bump: Has it any formule or just by experiment?
Yes, measuring 500 mL distilled water with 0.6 grams sodium bicarbonate will yield a 40 dkH solution.

billionzz used 3L as 3.6 grams is typically easier to weigh out and will be more accurate (most scales that measure to 0.1 grams are not that accurate, unless you have access to an analytical balance...)

Anthony


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post #5 of 8 (permalink) Old 11-04-2014, 02:10 PM
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Quote:
Originally Posted by Kavak View Post

Bump: Has it any formule or just by experiment?
Quote:
An aqueous solution containing 120 mg NaHCO3 (baking soda) per litre of water will contain 1.4285 mmol/L of bicarbonate, since the molar mass of baking soda is 84.007 g/mol. This is equivalent in carbonate hardness to a solution containing 0.71423 mmol/L of (calcium) carbonate, or 71.485 mg/L of calcium carbonate (molar mass 100.09 g/mol). Since one degree KH = 17.848 mg/L CaCO3, this solution has a KH of 4.0052 degrees.
http://en.wikipedia.org/wiki/Carbonate_hardness

I'm sure you can form a formula from the quote above but it's morning and my brain doesn't work.
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post #6 of 8 (permalink) Old 11-05-2014, 05:12 AM Thread Starter
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TNX u alot.said that 120 mg/l Nahco3 has 84.007g/mol bicarbonat.then said these amount of bicarbonat is equivalent to 71.485 mg/ carboant.how change bicarbonat to carbonat?i mean equivalent
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post #7 of 8 (permalink) Old 11-05-2014, 03:15 PM
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Simply, it's 120mg of NaHCO3 in 1L will yield you 4dKH (4.0052).
So everything change will be in proportion to that.
so in 500ml, you'll need 60mg of NaHCO3.

or if you need a 40dKH solution, just multiply 10 to the amount. in 1L of water, you'll need 1200mg or 1.2g of NaHCO3.

Oh, on converting carbonate/bicarbonate use the proportion as stated in the article, .71423/1.4285

Last edited by mistergreen; 11-05-2014 at 03:58 PM. Reason: +
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post #8 of 8 (permalink) Old 11-07-2014, 06:46 PM Thread Starter
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Originally Posted by mistergreen View Post
Simply, it's 120mg of NaHCO3 in 1L will yield you 4dKH (4.0052).
So everything change will be in proportion to that.
so in 500ml, you'll need 60mg of NaHCO3.

or if you need a 40dKH solution, just multiply 10 to the amount. in 1L of water, you'll need 1200mg or 1.2g of NaHCO3.

Oh, on converting carbonate/bicarbonate use the proportion as stated in the article, .71423/1.4285
Thank u so much
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