Chemical Reaction Calculator

1. You will need 2 moles of sodium hydroxide for every one mole of sulphuric acid as according to the equation H₂SO₄ + 2 NaOH = Na₂SO₄ + 2 H₂O.
2. As can be seen from the above equation, hydrogen gas will NOT be released from the reaction. Instead, water is produced as a byproduct. However, the reaction IS exothermic, so exercise caution when doing the mixing to prevent hot acid or base being splashed around.
3. Sulphuric acid is a strong acid, while caustic soda is a strong base. When the acid has been completely neutralized, the solution pH level should be 7.0. Litmus paper will be purple at this pH level.

Hi Dvader , thanks for your so clear explanation.

How I can convert MOL to Kg , I got from a cacululator

http://web.visionlearning.com/MW_calculator.shtml

That H2SO4 as an 97.06599999999999 Molecular Weight:

and each componet is

Atom #Atoms AtomicMass Weight%

S, 1, 32.06, 33.029%

O, 4, 15.999, 65.932%

H, 1, 1.008, 1.038%

A long long time ago , about 40 Years ago, it was my favorite topic at chemical calssroom, but time as erased my ram, stechiometry is the name given to this calcs.

And , as your experience, what is the cheapest base to be used to neutralise the sulphuric acid recovered from used acid-lead batterys?Calciun Oxide is a cheap raw material in my place.Thanks a lot in advance

I live in Córdoba Argentina.

"I'm not a chemical expert, I only know a few basic on it."

CAUTION!!!!!

When Vader said these were strong agents, he wasn't kidding.

You could injure yourself or someone else if you don't know exactly how to handle this neutralizing process.

I'd go to some chemical mfg. websites and look for help. At least there, there's a remote chance that you could sue for improper guidance by the "experts".

No offense to Vader, for I'm sure he's correct, but just be sure you know how to proceed, before you do.

Of course I know about danger doing it , thast is why I want to learn about it.

My city as a few experienced people in this topic , as chemical is not a main activity here.

What I want is to know a few , just to better understand the task to do.

Before I make any on it, I will call to some chemical expert to advice me.

Thanks.

One mole of a given substance contains the molecular weight of the pure substance. For example: one kg mole of H2SO4 is 97.066 kg of 100% Sulfuric Acid. Two kg moles of NaOH would be 2*(22.99+16.00+1.008) or 2*(39.998) or 79.996 kg of 100% NaOH.

If you are diluting the NaOH with water to 50% (wt) the weight of 50% NaOH solution would be twice that to react with the H2SO4.

Many excellent answers given here. We cannot over-emphasize the danger involved with handling concentrated sulfuric acid and sodium hydroxide. They can literally eat you alive! It can blind you if splashed in your eyes. When you figure out what you want to do, do it first on a SMALL scale, maybe 10 grams of sulfuric acid. BY all means, wear rubber gloves, leather shoes, a rubber or plastic apron and a face shield. Acid can splatter when neutralized. Suspend a thermometer in the container with the sulfuric acid so you can see you much and how rapidly heat is generated. I think you will be impressed! Imagine this small reaction scaled up to your 10 kg of acid and figure out how to remove this much heat from the reactor so you can cool the reaction. Don't dump the base in the acid. Add it slowly. It may be useful to add 95% of the base calculated and check with litmus paper, add a little more and check again until it is neutral.

Hi WCFLOYD , thanks for you tips.

Safety is my first concern on it.

What other base can I use?

In my city I can get cheap Ca(OH)_{2 powder}, or also CaO.

What about to use CaCO_{3 , I can get it from stone mills, in a mixture with water from saw banks.}

_Regards.

_Gabriel

_{Note , here in Argentina we have, today, the Friend´s day , in conmemoration to the first step man on the moon.}

_{All bar and restaurants ar full of people, it is not a hollyday , just a good reason to take some Beers , or wines.}

Happy Friends Day! Sounds like a wonderful occasion to enjoy a beer with friends.

You can use calcium hydroxide or calcium oxide. I would avoid the calcium carbonate. It will release carbox dioxide and cause much foaming and bubbling. Have your acid stirring and slowly add the calcium powder. It will get thick as calcium sulfate forms and precipitates.

Could be any practical use of Calciun Sulfate ??

It is my inted to recyclate it.

Calcium sulfate is gypsum. It is used in making wall board (sheet rock, as we call it here) for building houses. Others posting here may know other uses. How much calcium sulfate will you make per month?

I have about 2000 liter acid from battery , density about 1100 1150, by week.

Thanks for all your's efforts.

Both about safety , and methods to get my bes solution.

Thanks.

It might be a better by-product than were sodium hydroxide to be used to neutralise the acid. Sodium sulphate is of practically no economic value. Calcium sulphate is, as others suggest, useful elsewhere.

Magnesium Hydroxide Mg(OH)2, also known as Milk of Magnesia, will neutralize acids including sulfuric acid. Industrial strength prodcts such as power or 60% solids slurry are often used as alternates to NaOH or Ca(OH)2. Mg(OH)2 is much safer than NaOH (caustic) but is a bit slower to react. Ca(OH)2 typically is less pre and often creates a lot of waste sludge compared to Mg(OH)2. You can get more info from www.magnesiaspecialties.com

Devitg

For estimation of how much caustic soda solution as per your prepared concentration, with reference to the given specific con sulphuric acid solution ,you may attempt the following procedure.

Take a specific volume of given sulphuric acid solution[say 50 ml], add phenolphthalein indicator[now it will be colourless] in a conical flask. Take the caustic soda solution in burette and gradually titrate,till getting a pink tone end point. If you find sudden heat being developed due to exothermic reaction, keep the conical flask immersed in a cool water bath with over flow arrangement from tap.Now having estimated volumetric equivalents of sulphuric acid and your caustic solutions, now you can easily estimate how much volume of caustic solution will be required to neutralize the given sulphuric acid. This is a simple volumetric analysis applicable to your need.

But remember to follow safety precautions in bulk operations.

It seems to be direct answer to the given situation.

Hello :I am a chemist and read about your problem with sulfuric acid. First you will need for 100gr of acid 80 gram of Sodium hidroxide in solution no matter what volume these are the realtion acid / NaOH. Second if you handle with conc. acid put acid over de solution of NaOH. SLOWLY. let cool the reaction. never in the other way why the reaction is extreme exotermic. Third : I advice you not to use Calcium hidroxide or you must later seek for a way to dispose gips(white substance). The reaction acid sodium hidroxide result in water !!

good Luck Dr. Vasquez

Hi Dr Vasquez, do you speak Spanish.?

I live in Argentina.

When you say "The reaction acid sodium hidroxide result in water !!"

Do you mean that it will be only WATER , where will go the Na and S ??

The main task here is to try to get , not a waste, we want to get a NEW product.

It can be a fertilizer, or so on.

Thanks in advance.

When you use sodium hydroxide to neutralize the sulphuric acid, you will get sodium sulphate solution. You will have to evaporate the water away to recover the salt. That's the reason why I suggested using lime instead. It's because calcium sulphate is only very slightly soluble in water, so it's easier to recover. Of course, you'll still need to evaporate the water away to recover the small amount still in solution. It also has greater commercial application.

If you are setting up a commercial plant, I suggest that you use a conical process reactor so that the precipitated gypsum can accumulate at the bottom to be pumped out to a drying bed or something similiar.