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The condition for minimum change in pH f...

The condition for minimum change in pH for a buffer solution is

A

Isoelectronic species are added

B

Conjugate acid or base is added

C

`pH = pK_(a)`

D

None of these

Text Solution

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The correct Answer is:
C
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The solution which consumes [H^(+)] or [OH^(-)] or both simultaneously from externally added base in order to give negligible change in pH , is known as buffer solution. In general, the solution resists the change in pH. Buffer solution does not mean that there does not occur a pH change in pH. Buffer solution des not mean that there does not occur a pH change at all. It implies the pH change occurs but in neglibible amount. There are two types of buffer (i) Acidic buffer: it is a mixture of weak acid and its salt acid strong base. (ii) Basic buffer : It is a mixture of weak base and its salt with strong acid. pH of 0.01 M (NH_(4))_(2)SO_(4) and 0.02 M NH_(4)OH buffer ( pK_(a) of NH_(4^(+)) = 9.26) is

Statement-1: pH value of acidic buffer solution changes , If buffer solution is diluted upto very large extent. Statement-2: [H^(+)] decreases due to change in concentration as well as alpha increases and decreases in concentration is more as compared to increases in alpha .

Higher the amount of acid or base used to product a deinite change of pH in a buffer solution, higher will be its buffe capacity. Buffer capcity of solution is maximum under the following conditions [Salt] = [Acid](in acid buffer) [Salt] = [Base] (in base capacity] pH of buffer solution lies inthe range given below pH = pH_(a) +-1 In other words,any buffer solution can be used as buffer up to two pH units only, depending upon the value of pK_(a) or pK_(b) . A buffer is said to be efficient when pH = pK_(a) or pOH = pK_(b) Which among the following solution will the most efficient buffer

Higher the amount of acid or base used to product a deinite change of pH in a buffer solution, higher will be its buffe capacity. Buffer capcity of solution is maximum under the following conditions [Salt] = [Acid](in acid buffer) [Salt] = [Base] (in base capacity] pH of buffer solution lies inthe range given below pH = pH_(a) +-1 In other words,any buffer solution can be used as buffer up to two pH units only, depending upon the value of pK_(a) or pK_(b) . A buffer is said to be efficient when pH = pK_(a) or pOH = pK_(b) Any buffer can be used as a buffer up to :

Higher the amount of acid or base used to product a deinite change of pH in a buffer solution, higher will be its buffe capacity. Buffer capcity of solution is maximum under the following conditions [Salt] = [Acid](in acid buffer) [Salt] = [Base] (in base capacity] pH of buffer solution lies inthe range given below pH = pH_(a) +-1 In other words,any buffer solution can be used as buffer up to two pH units only, depending upon the value of pK_(a) or pK_(b) . A buffer is said to be efficient when pH = pK_(a) or pOH = pK_(b) The buffer capacity is equal to

Higher the amount of acid or base used to product a deinite change of pH in a buffer solution, higher will be its buffe capacity. Buffer capcity of solution is maximum under the following conditions [Salt] = [Acid](in acid buffer) [Salt] = [Base] (in base capacity] pH of buffer solution lies inthe range given below pH = pH_(a) +-1 In other words,any buffer solution can be used as buffer up to two pH units only, depending upon the value of pK_(a) or pK_(b) . A buffer is said to be efficient when pH = pK_(a) or pOH = pK_(b) Buffer capacity is maximum when

Higher the amount of acid or base used to product a deinite change of pH in a buffer solution, higher will be its buffe capacity. Buffer capcity of solution is maximum under the following conditions [Salt] = [Acid](in acid buffer) [Salt] = [Base] (in base capacity] pH of buffer solution lies inthe range given below pH = pH_(a) +-1 In other words,any buffer solution can be used as buffer up to two pH units only, depending upon the value of pK_(a) or pK_(b) . A buffer is said to be efficient when pH = pK_(a) or pOH = pK_(b) pH of 0.08 "mol" dm^(-3) HOCl soluton is 2.85 . Calculate its ionization constant.

Higher the amount of acid or base used to product a deinite change of pH in a buffer solution, higher will be its buffe capacity. Buffer capcity of solution is maximum under the following conditions [Salt] = [Acid](in acid buffer) [Salt] = [Base] (in base capacity] pH of buffer solution lies inthe range given below pH = pH_(a) +-1 In other words,any buffer solution can be used as buffer up to two pH units only, depending upon the value of pK_(a) or pK_(b) . A buffer is said to be efficient when pH = pK_(a) or pOH = pK_(b) Acifity of BF_(3) can be explained on the basis of which of the following concepts

ERRORLESS -IONIC EQUILIBRIUM-Ordinary Thinking (Hydrogen ion concentration- pH scale and buffer solution )
  1. When 100 ml of M/10 NaOH solution and 50 ml of M/5 HCI solution are mi...

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  2. Aqueous solution of HCl has pH = 4 . Its molarity would be

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  3. The condition for minimum change in pH for a buffer solution is

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  4. Henderson's equation is pH = pK(a) + log.(["salt"])/(["acid"]). If the...

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  5. An alcoholic drink substance pH = 4.7 then OH ion concentration of thi...

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  6. pH of human blood is 7.4. Then H^(+) concentration will be

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  8. Components of buffer solution are 0.1 M HCN and 0.2 M NaCN. What is th...

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  10. 1 M NaCl and 1 M HCl are present in an aqueous solution. The solution ...

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  13. Hydrogen ion concentration in mol//L in a solution of pH=5.4 will be:

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  15. What is the pH value of (N)/(100) KOH solution

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  16. Given a 0.1 M solution of each of the following. Which solution has th...

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  17. A weak monoprotic acid of 0.1 M, ionizes to 1% in solution. What will ...

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