alkilinity

[Mark1964]

Ive forgot how to work out the alkilinity of my water using the salifert kit what was the sum (maths) again to find the answer??

 

[markp]

Use the figure on the table in the RHS column and then multiply the answer by 50 to get mg/l CaCO3.

So if the value is 2.4, then 2.4 x 50 = 120 mg/l CaCO3

ATB

 

[Mark1964]

Is the figures not in millilitres as crs is liquid

 

[jamesb]

No. You want to know how many milligrams of CaCO3 are in each litre of water. Also exactly the same as ppm in these units.

 

[graysalchemy]

No you then have to put that figure into the water treatment calculator in menu above to calculate the amount of crs.

:

AG

 

[Mark1964]

done a test it works out at 4.8

 

[Aleman]

You want to know how many milligrams of CaCO3 are in each litre of water. Also exactly the same as ppm in these units.

Actually not true :ugeek: :ugeek: there are 1 million milligrams in a Kilogram of water and that would be the same as ppm


Technically 1Kg of water at STP (standard Temperature and Pressure) has a volume of One Litre :whistle: :whistle: :ugeek: :ugeek:

So 4.8 meq's alkalinity times 50 is 240 mg/L as Calcium Carbonate. 1ml of CRS eliminates 183mg of Alkalinity . .so total volume of liquor times 240/150 gives the amount of CRS to add to teh Total Volume to leave the 'ideal' alkalinity of about 30mg/L

 

[Mark1964]

so ive just measured alkilinity using the salifert kit the result is 5.49. So 5.49 times 50 = 274.5 total liquor volume = 34.3l. So 274.5 divided by 34.3 = 8.29 is this correct :pray:

 

[Aleman]

so ive just measured alkilinity using the salifert kit the result is 5.49. So 5.49 times 50 = 274.5 total liquor volume = 34.3l. So 274.5 divided by 34.3 = 8.29 is this correct :pray:

Do you want to guess again or shall I just do it for you :whistle: :whistle:

 

[Mark1964]

dont need the figures just the sum :wha:

 

[Aleman]

Ok you need to leave 30mg/l for pale ales

274 - 30 = Amount to remove

1ml of CRS removes 180mg of Alkalinity so

Amount to remove / 180 = amount of CRS to Add to 1 L

amount of CRS to Add to 1 L * Total Liquor volume = Total Amount of CRS to add to liquor

( (274 - 30) / 180 ) * 34.3 = ???

The answer has been left as a student exercise :whistle: :whistle: :lol: :lol:

 

[Mark1964]

46.49ml crs to total liquor :

 

[Aleman]

:thumb:

Add 2/3rds of it initially, give it a good stir, and then leave it for 10 minutes . . . measure the alkalinity again, and see how much of the remaining amount you need to add . . . Stops you overdosing the liquor and dropping the mash pH too low.

 

[Mark1964]

Sorted thanks :