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Bromic Acid is also referred to as Hydrogen bromate or Bromic (V) acid. An oxoacid in nature that exists only in the aqueous solution. While its decomposition process to bromine which is the third lightest halogen, (atomic number 35) at room temperature, the solution of Bromic Acid has no color in its initial state. But it changes its color of the solution to yellow after the process.
What is Bromic Acid?
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Bromic acid is a significant oxidizing agent and is a prime ingredient in Belousov-Zhabotinsky reaction. There are several isomers of it. The aqueous solution of bromic acid breaks down in the air while keeping still or particularly while heating. HBr is easily soluble in water and form hydrobromic acid solution, and it is saturated at 68.85% of HBr by weight. On the other hand, Barium sulphate is insoluble in water and hence forms a precipitate. We can also get it as a product in the reaction of barium bromate Ba(BrO3)2) and sulphuric acid H2SO4. Barium sulphate live in its precipitated form. So, bromic acid can be retrieved by removing the precipitated barium sulphate.
Ba(BrO3)2 + H2SO4 → 2HBrO3 + BaSO4
We can also get Bromic acid, while break down of its barium salt with sulphuric acid. We can also obtain bromic acid by the passage of chlorine through bromine water:
5Cl2+Br2+6H2O→2HBrO3+10HCl
Bromic acid salt popularly known as bromates, are stable under normal conditions. However, they release oxygen, when they get decomposed while heating.
2KBrO3→2KBr+3O2
Bromates are acquired by electrochemical oxidation of their related bromides. Bromic acid and its salts show strong oxidizing abilities in its acidic solutions, reducing to its ionic state of Br− or to free bromine. They are also used as oxidizing reactants.
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The Structure for Bromic Acid
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The chemical formula of Bromic Acid is: HBrO3
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| Difference Between Acid and Base: Types, Properties and Sample Questions | Acids, Bases and Salts: Definition, Dissociation and Properties |
Properties of Bromic Acid
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The symbol of Bromic Acid is HBrO3. It is a strong oxidizing agent and very corrosive in nature. It is rarely found it in its pure state, but it can be mostly found in a solution. It is an inorganic acid which is quite similar to chloric acid. Due to its unavailability in its free state, it exists in aqueous solutions with highest concentration of 50.6 percent.
| Chemical Formula: | BrHO3 |
| Molecular weight: | 128.909 g·mol−1 |
| Conjugate Base: | Bromate |
Usage of Bromic Acid
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- Bromic acid is very useful for making bromates, known for the salt form of bromic acid.
- Hydrobromic acid is mainly helpful for the production of inorganic bromides. Notably some important bromides are of zinc, calcium, and sodium which is used in various
- It can also be used as a reagent for producing organobromine compounds.
- It is also used as a catalyst in the alkylation reactions and procuring of certain ores.
- Bromic acid is also used in making dyes and pharmaceuticals.
- One of the very important uses is in many numerous synaptic processes. Bromine releases the oxygen free radicals and is also utilized as a powerful oxidizing agent from the water in mucous membranes. Bromide ions are used as substitution for chloride ions in working of neurotransmitters as well as transport systems.
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Things to remember
- Bromic acid is an oxoacid which is found only in its aqueous state.
- It is one of the important ingredients in Belousov-Zhabotinsky reaction.
- It is a very strong oxidising agent and corrosive in nature.
- Bromic acid doesn’t change its colour in its initial state, but the colour changes to yellow when it starts decomposing.
- Due to its oxidising properties, it is used for making dyes and pharmaceuticals.
- It is also used as an active reagent in producing organobromine components.
- It is used in various synaptic processes as a substitute of chloride ions in working of various transport systems and neurotransmitters.
Representation of change of colour of bromic acid after decomposition
Sample Questions on Bromic Acid Formula
Question 1. Define Bromic Acid? [2 marks]
Answer: Bromic Acid commonly known as Hydrogen bromate or Bromic (V) acid. It is an oxoacid in nature. It is a prime ingredient in Belousov-Zhabotinsky reaction. It is a very strong oxidising agent which is corrosive in nature. It does not change its colour in its initial state but the colour changes to yellow when it starts decomposition.
Question 2. Calculate the molecular weight of Bromic Acid. [2 marks]
Answer: Formula of Bromic Acid is: HBrO3
Its molecular weight will be: = 1.00794+79.904+3×15.999
= 128.909 gram per mole.
Question 3. What is the mass of bromic acid (HBrO3) which reacts with excess HBr to produce 25.67g of b Bromine that is 74.2% effective? [4 marks]
Answer: HBrO3 + 5HBr → 3Br2 + 3H2O
1 mol HBrO3 reacts with 5 HBr to produce 3 mol Br2
Molar mass Br2 = 79.9 g/mol ×2 = 159.8 g /mol
Mol of Br2 in 25.67 g Br2 = 25.67g / 159.8 g/mol = 0.1606
Hence it will require,0.1606 mol / 3 = 0.0535 mol HBrO3
Molar mass HBrO3 = 1+79.9 + (3×16) = 128.9 g/mol
Mass of 0.0535 mol = 0.0535 mol ×128.9 g/mol = 6.896 g HBrO3 required
But reaction has yield = 74.2%
Mass of HBrO3 requires 6.896 g ×100%/ 74.2% = 9.294 g HBrO3 required
Hence, 9.29 g HBrO3 is required.
Question 4: What can we get barium bromate Ba(BrO3)2) is treated with sulphuric acid H2SO4. [2 marks]
Answer: When barium bromate is treated with sulphuric acid, we get bromic acid and barium sulphate in precipitated form.
Ba(BrO3)2 + H2SO4 → 2HBrO3 + BaSO4
Question 5. What are the uses of bromic acid? [5 marks]
Answer: Bromic acid is useful for various reasons such as-
- Bromic acid is very useful for making bromates, known for the salt form of bromic acid.
- Hydrobromic acid is mainly helpful for the production of inorganic bromides. Notably some important bromides are of zinc, calcium, and sodium which is used in various
- It can also be used as a reagent for producing organobromine compounds.
- It is also used as a catalyst in the alkylation reactions and procuring of certain ores.
- Bromic acid is also used in making dyes and pharmaceuticals.
- One of the very important uses is in many numerous synaptic processes. Bromine releases the oxygen free radicals and is also utilized as a powerful oxidizing agent from the water in mucous membranes. Bromide ions are used as substitution for chloride ions in working of neurotransmitters as well as transport systems.
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