Kalk numbers

[Minifoot77]

I think I got my math right is 159 grams of kalk in 26 gallons of water sound about right?

 

[Sisterlimonpot]

What's your goal? To make 26g of water fully saturated with calcium hydroxide?

If so, the rule of thumb is 6g to 1 gallon. Your numbers are in the ballpark.

 

[Randy Holmes-Farley]

As noted, that value is correct for saturation at 25 deg C if you are using calcium hydroxide. I used calcium oxide, which takes less.

 

[Reefahholic]

I think I got my math right is 159 grams of kalk in 26 gallons of water sound about right?

Should be about 169 grams. 6.5 grams per gallon I believe.

 

[Randy Holmes-Farley]

Should be about 169 grams. 6.5 grams per gallon I believe.

At 25 deg C, the exact solubility limit is 0.0204 M, which equates to 1.61 g/L or 6.1 g/Gallon of calcium hydroxide.

The solubility has an inverse temp relationship, and is higher in cooler water.

https://nvlpubs.nist.gov/nistpubs/jres/56/jresv56n6p305_A1b.pdf

 

[Minifoot77]

At 25 deg C, the exact solubility limit is 0.0204 M, which equates to 1.61 g/L or 6.1 g/Gallon of calcium hydroxide.

The solubility has an inverse temp relationship, and is higher in cooler water.

https://nvlpubs.nist.gov/nistpubs/jres/56/jresv56n6p305_A1b.pdf

I think my basement and my ro water stays about 65° Fahrenheit. there was a little bit of residual in the bottom of the barrel. I dosed 4100 ml of this solution to my tank last night hoping my math was correct to replace 90ml of soda ash.

 

[Minifoot77]

It's also the brs kalkwasser dosed 12 times over 12 hours

 

[Randy Holmes-Farley]

At 65 deg F, you can dissolve more. Residues can include insoluble calcium carbonate and magnesium hydroxide,

 

[Minifoot77]

At 65 deg F, you can dissolve more. Residues can include insoluble calcium carbonate and magnesium hydroxide,

For 26 gallons what would your total grams be?

 

[Randy Holmes-Farley]

For 26 gallons what would your total grams be?

at 65 degrees? I’m not sure without looking it up, but I always added excess and left the undissolved material on the bottom for the next batch.

 

[Minifoot77]

Ok so my kalk isn't strong enough for my evaporation... for 26 gallons of rodi at 67 degrees how many grams of kalk and white distilled vinegar should I be adding to get the most out of all this trouble I'm going throu lol

 

[Minifoot77]

Thanks in advance @Randy Holmes-Farley

 

[Randy Holmes-Farley]

You can go to three tablespoons of kalk and 45 ml vinegar per gallon of fresh water.

 

[Minifoot77]

You can go to three tablespoons of kalk and 45 ml vinegar per gallon of fresh water.

9 grams? My scale is easier...

 

[robinm]

A tablespoon is 14.175 grammes

 

[Minifoot77]

Sounds like a plan