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प्रश्न
Write any four applications of buffer solution.
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उत्तर
Buffer solution finds extensive applications in a variety of fields. Some of its applications are given.
- In a biochemical system: pH of blood in our body is maintained at 7.36 - 7.42 due to \[\ce{(HCO^-3 + H2CO3)}\] buffer. A mere change of 0.2 pH units can cause death. The saline solution used for intravenous injection must contain a buffer system to maintain the proper pH of the blood.
- Agriculture: The soils get buffered due to the presence of salts such as carbonate, bicarbonate, phosphates, and organic acids. The choice of fertilizers depends upon the pH of the soil.
- Industry: Buffers play an important role in the paper, dye, ink, paint, and drug industries.
- Medicine: Penicillin preparations are stabilized by the addition of sodium citrate as a buffer. When citric acid is added to milk of magnesia (Mg(OH)2), magnesium citrate is formed, which is a buffer.
- Analytical chemistry: In qualitative analysis, a pH of 8 to 10 is required for precipitation of cations IIIA group. It is maintained with the use of (NH4OH + NH4Cl) buffer.
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संबंधित प्रश्न
Cu is precipitated as CuS while Zn is not precipitated when H2S is passed through an acidic solution of Cu(NO3 )2 and Zn(NO3)2 respectively.
Choose the most correct answer:
Which of the Na following is a buffer solution?
Answer the following in one sentence :
How are basic buffer solutions prepared?
Answer the following in one sentence :
Write one property of a buffer solution.
Answer the following in one sentence :
Classify the following buffers into different types :
NH4OH + NH4Cl
Answer the following in one sentence :
Classify the following buffers into different types :
Cu(OH)2 + CuCl2
The pKb of weak base BOH [Kb(BOH) = 1 × 10-5] will be ______.
Write the formula to calculate pH of buffer solution.
Explain the types of buffer solutions.
Write one application of the following buffer:
NH4OH + NH4Cl
A buffer solution contains 0.3 mol dm–3 NH4OH (Kb = 1.8 × 10–5) and 0.4 mol dm–3 NH4Cl. Calculate pOH of the solution.
Veronal is used as a/an ______.
What is the pH of 0.5 litre buffer solution containing 0.01 mole of CH3COOH and 0.01 mole of CH3COONa?
[pKa of acid = 4.74]
Which will make basic buffer?
The hydrogen ion concentration of a buffer solution consisting of a weak acid and its salts is given by ____________.
Which of the following will produce a buffer solution when mixed in equal volumes?
On the basis of the equation \[\ce{pH}\] = – log \[\ce{[H+]}\], the \[\ce{pH}\] of 10–8 mol dm–3 solution of \[\ce{HCl}\] should be 8. However, it is observed to be less than 7.0. Explain the reason.
Assertion (A): An aqueous solution of ammonium acetate can act as a buffer.
Reason (R): Acetic acid is a weak acid and \[\ce{NH4OH}\] is a weak base.
Calculate the pH of buffer solution composed of 0.01 M weak base BOH and 0.02 M of its salt BA. [Kb = 1.8 × 10–5 for weak base]
Define Acidic buffer solution.
Calculate pKa of HF if Ka= 7.2 x 10-4.
Explain the types of buffers with example.
