DIY Alkatronic reagent

[gbroadbridge]

This is what I bought based on one of thread on r2r and lost the recipe, do you or anyone has correct recipe for this acid?

Sodium Hydroxide is not an acid.

For an Alkalinity titration you need a strong acid, such as Hydrochloric Acid or Sulphuric acid (amongst other possibilities)

 

[ravi197699]

This is what I bought, is this the correct product type ?

 

[Randy Holmes-Farley Verified Community Expert]

That material is fine for an alkalinity titration.

 

[ravi197699]

do I need to dilute this?

 

[ravi197699]

To clarify-

i measured 1,000ml 10.0N HCl using a 500ml volumetric flask and combined it with 9,000ml RODI for 10.0L 1.0N acid

then take 1,000ml of 1.0N and combine with 9,000ml rodi for 10.0L of “0.1N”

1L muriatic and 99L rodi would also work but then you’re having to store decades worth of reagent

thank you for sharing the recipe, what is the best place to buy

Hydrochloric Acid, 10.0 N​

 

[ravi197699]

1 part of 0.1N and 4 part RO water is correct ratio?

 

[Randy Holmes-Farley Verified Community Expert]

I cannot answer about what different devices require so I will have to leave that to others

 

[ravi197699]

what is the best place to buy 31.45% muriatic acid, does Home Depot or Lowes sell this concentration, I am not able to find info on their site in regard to concentration level

 

[Randy Holmes-Farley Verified Community Expert]

what is the best place to buy 31.45% muriatic acid, does Home Depot or Lowes sell this concentration, I am not able to find info on their site in regard to concentration level

Ace sells muriatic acid. I just bought some. You may need to look at their web sites to see exactly what concentration is sold at your local stores.

 

[ravi197699]

Ace sells muriatic acid. I just bought some. You may need to look at their web sites to see exactly what concentration is sold at your local stores

Ace sells muriatic acid. I just bought some. You may need to look at their web sites to see exactly what concentration is sold at your local stores.

Thank you

Ace sells muriatic acid. I just bought some. You may need to look at their web sites to see exactly what concentration is sold at your local stores.

@Randy Holmes - Thank you I was able to find the exact kind -full strength 20 Baume, 31.45%, muriatic acid,

Do I have the correct recipe - 1.9 ml of ~31.45% muriatic acid per Liter of RO water

 

[Randy Holmes-Farley Verified Community Expert]

Thank you

@Randy Holmes - Thank you I was able to find the exact kind -full strength 20 Baume, 31.45%, muriatic acid,

Do I have the correct recipe - 1.9 ml of ~31.45% muriatic acid per Liter of RO water

Not sure where that number came from, but it’s about 0.019 N.

 

[ravi197699]

Correct. Ready to be used in the Alkatronic.

Hello gm all, I followed the same recipe 1.9 ml of ~31.45% muriatic acid per L of RO water, which will give us 0.02N that is ready to use solution, I made this solution and calibrated Pump C of my alkatronic and am running test every 1 hr and I am getting reading of 11.1, what am I doing wrong?

 

[gbroadbridge]

Hello gm all, I followed the same recipe 1.9 ml of ~31.45% muriatic acid per L of RO water, which will give us 0.02N that is ready to use solution, I made this solution and calibrated Pump C of my alkatronic and am running test every 1 hr and I am getting reading of 11.1, what am I doing wrong?

I'd suggest that the acid you started with was weaker than 31%.

If you expect a recipe to work without adjustment you need to use a known strength acid to start with.

I use reagent grade 1.0N acid.

 

[ravi197699]

Not sure where that number came from, but it’s about 0.019 N.

I'd suggest that the acid you started with was weaker than 31%.

If you expect a recipe to work without adjustment you need to use a known strength acid to start with.

I use reagent grade 1.0N acid.

I will try to source this grade reagent,

 

[ravi197699]

I will try to source this grade reagent,

what is the recipe for 1.0N acid, is it 4:1 ratio mix?

 

[ravi197699]

Not sure where that number came from, but it’s about 0.019 N.

what would be the correct mixing ratio for 31.45%, muriatic acid? thank you,

 

[Randy Holmes-Farley Verified Community Expert]

what would be the correct mixing ratio for 31.45%, muriatic acid? thank you,

I don’t follow what each machine needs, but I can do the calculations for a specific value. I’ll do it for 0.1 N HCl, but I do not guarantee that is what the machine expects.

I’ll note however, that the number 31.45 has a lot off significant figures to it that tells me it’s likely an estimate, not a fixed concentration.

31.45% HCl is about 9.97 M. I’d round that to 10 M. To get to 0.1 N, mix 99 parts by volume ro/di with I part acid by volume.

 

[ravi197699]

I don’t follow what each machine needs, but I can do the calculations for a specific value. I’ll do it for 0.1 N HCl, but I do not guarantee that is what the machine expects.

I’ll note however, that the number 31.45 has a lot off significant figures to it that tells me it’s likely an estimate, not a fixed concentration.

31.45% HCl is about 9.97 M. I’d round that to 10 M. To get to 0.1 N, mix 99 parts by volume ro/di with I part acid by volume.

Thank you Randy, I will give it a try, if not I will buy the 0.1N solution gallon