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Showing posts with label IONIC EQUILIBRIUM:. Show all posts
Showing posts with label IONIC EQUILIBRIUM:. Show all posts
Friday, February 12, 2021

What will be the pH of the buffer solution containing 0.15 moles of NH4OH and 0.25 moles of NH4Cl Kb for NH4OH is 1.8x10^-5.

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Saturday, September 26, 2020

The pH of at which an acid indicator with Ka is 10^-15 changes colour when indicator concentration 1×10^-5 M is?

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SOLUTION:

An indicator with Ka = 10^-5 is solution with pH = 6 Calculate % of indicator in ionised form?

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SOLUTION:

For acidic indicator, pH range is 3 to 4.6 calculate the ratio of[ In- ] and H+ for the appearance of solution in a single colour.

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SOLUTION: Given pH range 3.0 to 4.6 so pK In = (3.0+ 4.6)/2 =3.6

For an indicator pKa is 6 Calculate pH of Solution having this indicator such that 40% indicator molecules remain in ionised form.

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SOLUTION:   We know that  

The pH range of a basic indicator is 4 to 6.5 Calculate the dissociation constant of indicator?.

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SOLUTION:   pK In must be midpoint of pH range for acidic indicators and pOH range for basic indicators The pH range = 4 to 6.5 so pOH ran...

What are DOUBLE SALTS ?

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DOUBLE SALTS: (1)The addition compounds formed by the combination of two simple salts are termed as double salts. (2) Double salts are s...

What is the pH of 0.10 M CH3COONa solution. Hydrolysis constant of sodium acetate is 5.6 × 10-10 ?

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SOLUTION: Hydrolysis of the salt may be represented as

A 0.0258 M solution of the sodium salt, NaH of the weak monoprotic acid, HA has a pH of 9.65. Calculate Ka of the acid AH.

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Wednesday, November 27, 2019

TITRATION OF STRONG ACID WITH STRONG BASE:

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The titration of HCl (aq) with a standardized NaOH solution illustrated the titration of strong acid by a strong base. The molecular a...