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प्रश्न
Name the buffer which is used to maintained pH of 8 to 10 for precipitation of cations III A group in qualitative analysis.
उत्तर
Ammonium hydroxide + Ammonium chloride (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.
Answer the following in one sentence :
How are basic buffer solutions prepared?
Answer the following in one sentence :
Classify the following buffers into different types :
CH3COOH + CH3COONa
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.
Define buffer solution.
Write one application of the following buffer:
Citrate buffer
Write one application of the following buffer:
NH4OH + NH4Cl
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]
____________ forms a basic buffer solution.
Which will make basic buffer?
The hydrogen ion concentration of a buffer solution consisting of a weak acid and its salts is given by ____________.
Ksp of Al(OH)3 is 1 × 10−15 M. At what pH does 1.0 × 10−3 M Al3+ precipitate on the addition of buffer of NH4Cl and NH4OH solution?
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): A solution containing a mixture of acetic acid and sodium acetate maintains a constant value of \[\ce{pH}\] on addition of small amounts of acid or alkali.
Reason (R): A solution containing a mixture of acetic acid and sodium acetate acts as a buffer solution around \[\ce{pH}\] 4.75.
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.
Which of the following combinations will constitute a buffer solution?
Write the applications of buffer solution.
Calculate pKa of HF if Ka= 7.2 x 10-4.
Explain the types of buffers with example.
