In lab H 2O2 is prepared by reaction of BaO2 ⋅ 8H 2O and H 2S O4 (cold). A paste of BaO2 ⋅8H 2O is prepared in ice-cold water and then added gradually to ice-cold dilute sulphuric acid. Barium peroxideBaOX 2 ⋅8HX 2O +H 2S O4 → BaS O4↓ +H 2O2 +8H 2O
How do you prepare H2O2 from H2SO4?
(i) H 2 O 2 is prepared by the action of hydrated barium peroxide on dilute H 2 SO 4. A thin paste of hydrated peroxide (BaO 2 .8H 2 O) is made with ice cold water. It is added very slowly to an ice cold 20% sulphuric acid. Barium sulphate is precipitated and removed by filtration. The filtrate obtained contains about 5% hydrogen peroxide.
How to prepare hydrogen peroxide?
Let us have a look at the various methods of preparation for hydrogen peroxide. When barium peroxide is acidified and the excess water is removed by the process of evaporation under reduced pressure, we obtain hydrogen peroxide. The following reaction will clarify this: Hydrogen peroxide is prepared by the electrolysis of 30% ice-cold H 2 SO 4 .
How do you make hydrogen peroxide from BaO2?
(iii) BaO 2 - Carbonic acid process: Hydrogen peroxide is most conveniently prepared by passing carbon dioxide gas into a suspension of barium peroxide in ice-cold distilled water. Barium carbonate precipitate is removed by filtration. The filtrate obtained is a dilute solution of hydrogen peroxide.
What is hydrogen peroxide (H2O2)?
What is Hydrogen Peroxide (H2O2)? Hydrogen peroxide is the simplest kind of peroxide available (oxygen-oxygen single bond). It is a colourless liquid and is used in aqueous solution for safety reasons.
What is hydrogen peroxide used for?
Hydrogen peroxide is used for stain removal, as a cleanser and as a disinfectant.
State three physical properties of hydrogen peroxide.
The physical properties of hydrogen peroxide are: It is a pale blue colour in its pure form. The viscosity of H 2 O 2 is slightly more than wate...
What is the oxidation of oxygen in hydrogen peroxide?
The oxidation state of oxygen in hydrogen peroxide is -1.
Give an example of a reaction in which hydrogen peroxide is an oxidizing agent.
Hydrogen peroxide oxidizes sodium nitrate to sodium nitrite. NaNO 2 + H 2 O 2 → NaNO 3 + H 2 O
What is the product of the reaction between ozone and hydrogen peroxide?
Ozone on reaction with hydrogen peroxide gives oxygen and water. Hydrogen peroxide acts as a reducing agent in this reaction. O 3 + H 2 O 2 → H...
Why is barium peroxide not used in the above method?
Anhydrous barium peroxide is not used in the above method because barium sulphate forms a protective coating on barium peroxide thereby preventing the further reaction. (ii) An improved method for the preparation of hydrogen peroxide is by treating hydrated barium peroxide with phosphoric acid.
How does ice form hydrogen bonds?
We know that in ice, each oxygen atom is surrounded by four hydrogen atoms in such a way that two hydrogen atoms are linked to an oxygen atom by covalent bonds whereas other two hydrogen atoms are linked by hydrogen bonds. In ice (solid state), a water molecule is associated with four other water molecules through hydrogen bonding in a tetrahedral manner. This gives rise to open cage-like structure which prevents the close packing of molecules (lower density). When ice absorbs heat and melts to form water, hydrogen bonds break and close packing of water molecules take place. Due to this close packing, the density of water is higher than that of ice and ice floats over water.
How is barium carbonate precipitate removed?
Barium carbonate precipitate is removed by filtration. The filtrate obtained is a dilute solution of hydrogen peroxide.
What can be used in place of cold water?
In place of cold water, dilute sulphuric acid (20%) can also be used. Sodium peroxide in small amounts at a time is added to cold 20% H 2 SO 4.
Why is hydrogen important to the economy?
Hydrogen is required for the synthesis of a number of industrial products and thus, affects the economy of a country. For example:
Which group is halogens in?
On the other hand, like halogens (having electronic configuration ns 2 np 5 belonging to group 17 of the periodic table), it is short by one electron to the corresponding noble gas configuration (ns 2 np 6 ).
Is hydrogen a group 17 metal?
Although hydrogen to a certain extent resembles both with al kali metals ( Group I) and halogens (Group 17), yet it differs from them as well. Therefore, it is best placed separately in the periodic table.
How to get oxygen gas?
One of the simplest ways to get free oxygen gas is by mixing water, manganese dioxide and some hydrogen peroxide in a sealed flask with a delivery tube leading to a container. You can also use a second tube to continuously add H2O2. The water is used to dilute the hydrogen peroxide and slow down the decomposition, as well as to absorb the heat released by the reaction. The manganese dioxide is used as a catalyst.
What is hydrogen peroxide reacted with?
Hydrogen peroxide in the process of its preparation from Barium peroxide (hydrated) is reacted with cold Sulphuric Acid. The underlying reaction is as follows :-
How does diethyl ether form peroxide?
Diethyl ether peroxide for instance is nearly a reverse case where Diethyl ether forms peroxides by absorbing oxygen gas directly from the air. A quite unfortunate situation as such peroxides are quite explosive.
What is the chemical formula for hydrogen peroxide?
The O-O group is the peroxide group of the compound. And Hydrogen Peroxide is the simplest peroxide. The chemical formula for hydrogen peroxide is H2O2. It is a water molecule with one extra atom of oxygen, It has various uses ranging from disinfectant to propellant for rockets.
What gas decomposes at 150.2°C?
At 150.2 °C, H₂O₂ decomposes into H₂O and O₂. The oxygen gas leaves the solution.
Is hydrogen peroxide a chemical?
Hydrogen peroxide is an unstable chemical and so it undergoes spontaneous decomposition.
Is hydrogen peroxide harmful to skin?
Hydrogen peroxide is corrosive to skin, eyes, and mucous membranes at high concentrations (>10%); lower concentrations may cause irritation. Symptoms become more severe as the concentration of hydrogen peroxide increases.
How to make hydrogen peroxide?
Hydrogen peroxide can be prepared in the laboratory by the action of ice cold, dilute sulphuric acid on sodium peroxide or hydrated barium peroxide (BaO2.8H2O).
What is filtered off of hydrogen peroxide?
The precipitated barium peroxide or barium carbonate is filtered off which leaves hydrogen peroxide.
What crystals separate out of sodium sulphate?
Most of the sodium sulphate separates out on cooling as crystals of Na2SO4 .10H2O.
Is barium sulphate a precipitate?
O2. . (l) Barium sulphate is allowed to settle down as a precipitate and filtered off. The filtrate obtained is a dilute solution of hydrogen peroxide. Phosphoric acid can be used in place of sulphuric acid. Alternatively, carbon dioxide gas may be passed through hydrated barium peroxide paste in ice cold water, in a slow stream.
