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what is the function of using dilute sulphuric acid in electrolysis of water

by Marques Murphy Published 3 years ago Updated 3 years ago

During the process of electrolysis of water, dilute sulphuric acid splits into when electricity is passed through the dilute sulfuric acid solution. The electrolyte is dilute sulfuric acid (= acidified water) which, during electrolysis is split into hydrogen and oxygen gases.

Full Answer

What is the proper way to dispose sulfuric acid?

  • The amount of water needed to dilute the acid is dependent upon how concentrated your solution is. The more concentrated, the more water you will need. ...
  • Never add water directly to the acid, this can cause the water to quickly boil and splash the acid.
  • Take care not to spill any of the acid as you dilute it.

Does dilute sulfuric acid conduct electricity?

Sulfuric acid is a strong acid and the first H iionizes completely. Citric acid is a weak acid and only partialky ionizes . Ions conduct the electricity. So AT THE SAME CONCENTRATION sulfuric acid will contain more ions and be a better conducting solution. A very dilute solution of sulfuric acid can be made which would be a poorer conductor.

Why would we heat dilute sulphuric acid?

Why Sulphuric acid is added? Why ? Addition of a few drops of sulphuric acid (H2SO4) makes water conducting in nature because the acid ionises in water to release H+ ions and HSO-4 ions. … Why is sulfuric acid used instead of hydrochloric acid? Available in concentrations ranging from 0% to 98% sulfuric is also the least expensive acid to use.

Why is phosphoric acid used instead of sulfuric acid?

Calculations:

  • Based on the mass of salicylic acid (~2 g) determine the maximum yield of aspirin (theoretical yield) from this amount of starting material. ...
  • Calculate the mass of crude aspirin that you collected.
  • Calculate the percent yield of aspirin = [amount collected / theoretical yield] x 100%
  • What is the melt point of your dried aspirin? ...

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What is the function of dilute sulphuric acid?

In various concentrations the acid is used in the manufacture of fertilizers, pigments, dyes, drugs, explosives, detergents, and inorganic salts and acids, as well as in petroleum refining and metallurgical processes.

What is the role of dilute acid in electrolysis?

Dilute sulfuric acid contains water. The ions present in this mixture are H + and OH - (from the water) and H + and SO 4 2- from the sulfuric acid. The H + ions are attracted to the cathode and the two negative ions are attracted to the anode but it is the OH - ion which loses electrons.

What does sulfuric acid do in electrolysis?

Extra COMMENTS on the electrolysis of water The electrolysis of many salts (e.g. sulfates of reactive metals) or sulfuric acid produces Page 4 hydrogen at the negative cathode electrode and oxygen at the positive anode electrode.

Why do we use acid in water electrolysis?

These ions are formed when a small proportion of water molecules naturally dissociate . If water is acidified with a little dilute sulfuric acid: H + ions are attracted to the cathode , gain electrons and form hydrogen gas. OH - ions are attracted to the anode , lose electrons and form oxygen gas.

Why is dilute sulphuric acid preferred to dilute nitric acid in acidification of water?

In the electrolysis of acidified water, dilute sulphuric acid is preferred to dilute nitric acid for acidification because HNO3 is volatile.

Which products are formed when dilute sulfuric acid undergoes electrolysis?

During the electrolysis of dilute aqueous sulphuric acid, using platinum electrodes, oxygen gas is liberated at anode. Hence, the option B ) oxygen is the correct answer.

What is electrolysis in water?

Reminders: Electrolysis (of acidified water) is a way of splitting up (decomposition) of the compound (water) using electrical energy. The electrical energy comes from a d.c. (direct current) battery or power pack supply. A conducting liquid, containing ions, called the electrolyte (dilute sulfuric acid), must contain the compound (water) ...

Which electrodes are used for sulfate salts?

sodium sulfate, magnesium sulfate and potassium sulfate the electrolysis products of the aqueous salt solution are hydrogen at the negative (–) cathode electrode and oxygen at the positive (+) anode with inert electrodes such as carbon or platinum.

What is the introduction to electrolysis?

INTRODUCTION to electrolysis - electrolytes, non-electrolytes, electrode equations, apparatus 2. Electrolysis of acidified water (dilute sulfuric acid) and some sulfate salts and alkalis 3. Electrolysis of sodium chloride solution (bri ne) and bromides and iodides 4.

What is the negative sulfate ion?

The negative sulfate ions (SO 42-) or the traces of hydroxide ions ( OH–) are attracted to the positive electrode. But the sulfate ion is too stable and nothing happens (its not discharged). Instead either hydroxide ions or water molecules are discharged and oxidised to form oxygen.

How are hydrogen ions reduced to hydrogen gas molecules?

The hydrogen ion or water molecules are reduced to hydrogen gas molecules by electron gain at the negative electrode. 2H+(aq) + 2e– ==> H2 (g) (hydrogen gas, bubbles seen on the negative electrode) positive ion reduction by electron gain.

What is the liquid that breaks down a battery?

A conducting liquid, containing ions, called the electrolyte (dilute sulfuric acid), must contain the compound (water) that is being broken down. The electricity must flow through electrodes dipped into the electrolyte to complete the electrical circuit with the battery.

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