all of these sentences about activity coefficient are correct except :

the activity coefficient is more accurate in mixed electrolyte solution than in single one

( f =1 ) , for undissociated acid

f is a function of the total electrolyte concentration of the solution

the reaction " A + B <-------> 2C + D + Heat " will procced from right to left when :

sufficient conc. of C is present

All of these sentences are correct except :

keq0 takes in consideration the ionic strength

when there is an ionic strength , the molar conc. is not equal to the effective concentration

The wrong sentence is :

the equilibrium constant give an idea about the rate of reaction how to fast

the larger keq of an acid , the stronger will be acid

keq value depends on the solvent of the rxn

the charge balance equation of 2 moles of Na2SO4 that is added into 1 L water is :

[Na+] + [H+] = [OH-] +2* [SO4-2]

Which of the following statements is not correct

A bronsted acid is an electron pair donor

A lewis base is an electron pair donor

The conjugate acid of NH3 is NH4+

One of these sentences is incorrect during adding a diverse salt to an aqueous solution :

an increase in the dissociation of a weak electrolyte

the diverse ion shields the ions of weak acid

Analytical Chemistry ( Second ) ❤️

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1/28 Questions

All of these sentences about activity coefficient are correct except :
- ( f =1 ) , for undissociated acid
- f is a function of the total electrolyte concentration of the solution
- The activity coefficient is more accurate in mixed electrolyte solution than in single one

About This Quiz

اللهم رحمة و نور لعمر وتالا ❤️

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Mar 20, 2023

Quiz Edited by
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Jul 14, 2019

Quiz Created by
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Analytical Chemistry ( Second ) ❤️

All of these sentences about activity coefficient are correct except :

Quiz Preview

One of the following does not affect neither k_eq nor the position of chemical reactions :

Calculate the ionic strength of 0.2 M solution of KNO₃ and 0.2 M of Al₂SO₃

The pH of a solution prepared by mixing 2 ml of monoprotic strong acid of pH=3 and 3 ml of monohydroxy strong base of pH=10 is

In case of combination of 2 ionic species , the addition of diverse salt shifts the reaction to the left ( reactant باتجاه ال ) & decreases Complex's formation constant ( k_eq).

It is based on the low of conservation and # of atom in the reaction is constant

Very weak acid dont contribute to the ionic strenght

The POH of a blood sample whose pH 7.4 at 37 C is : Kw at 37 C = 2.5 * 10^-14

Calculate the precent dissociation for 0.09 M HCN

The reaction " A + B <-------> 2C + D + Heat " will procced from right to left when :

The normal blood pH is 7.35-7.45 this value must be measured at

All of these sentences are correct except :

K_eq , pk_a , pH are independent on ionic strength for the reaction involving chared species

The wrong sentence is :

The conjugate base H₂PO^-₄is

The charge balance equation of 2 moles of Na₂SO₄ that is added into 1 L water is :

Which of the following is stating that : " the rate of a chemical reaction is proportional to the active masses of the reacting substances present any time " :

The self-ionization of a solvent to give cation and anion

Calculate the pH of a solution of 510^-3 M C₆H₅COOH , k_a = 6.310^-5 in the presence of 0.05 M k₂SO₄ ( a_H = 9 Angstrom , a_C_6H5COO = 6 Angstrom )

Which of the following statements is not correct

The POH of 1*10^{-7 M solution of HCl is}

The ph of 0.1M solution of sodium acetate ( salt of weak acid ) NaOAC Kb = 5.7* 10^-10

110^-4 M of a weak electrolyte AB , dissociates to A⁺ & B^- with k_eq⁰ = 210^-8 . calculate the % dissociation in the presence of 0.1 M diverse salt ( f_A = 0.6 , f_B= 0.7 )

One of these sentences is incorrect during adding a diverse salt to an aqueous solution :

The pH, POH, [OH^-] respectively 2*10^-5 HNO₃

The correct statement of the following is

Solution of. 01M HA has pH=2.8, the estimated Ka of the acid is

The POH of a solution prepared by adding 25 ml of 0.1 M NaOH to 30 ml of 0.2 M acetic acid ( HOAC ) Ka = 1.75 * 10^{-5
is :}

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All of these sentences about activity coefficient are correct except :

Quiz Preview

One of the following does not affect neither keq nor the position of chemical reactions :

Calculate the ionic strength of 0.2 M solution of KNO3 and 0.2 M of Al2SO3

The pH of a solution prepared by mixing 2 ml of monoprotic strong acid of pH=3 and 3 ml of monohydroxy strong base of pH=10 is

In case of combination of 2 ionic species , the addition of diverse salt shifts the reaction to the left ( reactant باتجاه ال ) & decreases Complex's formation constant ( keq).

It is based on the low of conservation and # of atom in the reaction is constant

Very weak acid dont contribute to the ionic strenght

The POH of a blood sample whose pH 7.4 at 37 C is : Kw at 37 C = 2.5 * 10-14

Calculate the precent dissociation for 0.09 M HCN

The reaction " A + B <-------> 2C + D + Heat " will procced from right to left when :

The normal blood pH is 7.35-7.45 this value must be measured at

All of these sentences are correct except :

Keq , pka , pH are independent on ionic strength for the reaction involving chared species

The wrong sentence is :

The conjugate base H2PO-4 is

The charge balance equation of 2 moles of Na2SO4 that is added into 1 L water is :

Which of the following is stating that : " the rate of a chemical reaction is proportional to the active masses of the reacting substances present any time " :

The self-ionization of a solvent to give cation and anion

Calculate the pH of a solution of 5*10-3 M C6H5COOH , ka = 6.3*10-5 in the presence of 0.05 M k2SO4 ( aH = 9 Angstrom , aC6H5COO = 6 Angstrom )

Which of the following statements is not correct

The POH of 1*10-7 M solution of HCl is

The ph of 0.1M solution of sodium acetate ( salt of weak acid ) NaOAC Kb = 5.7* 10-10

1*10-4 M of a weak electrolyte AB , dissociates to A+ & B- with keq0 = 2*10-8 . calculate the % dissociation in the presence of 0.1 M diverse salt ( fA = 0.6 , fB = 0.7 )

One of these sentences is incorrect during adding a diverse salt to an aqueous solution :

The pH, POH, [OH-​​​​​​] respectively 2*10-5 HNO3

The correct statement of the following is

Solution of. 01M HA has pH=2.8, the estimated Ka of the acid is

The POH of a solution prepared by adding 25 ml of 0.1 M NaOH to 30 ml of 0.2 M acetic acid ( HOAC ) Ka = 1.75 * 10-5 is :

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One of the following does not affect neither k_eq nor the position of chemical reactions :

Calculate the ionic strength of 0.2 M solution of KNO₃ and 0.2 M of Al₂SO₃

In case of combination of 2 ionic species , the addition of diverse salt shifts the reaction to the left ( reactant باتجاه ال ) & decreases Complex's formation constant ( k_eq).

The POH of a blood sample whose pH 7.4 at 37 C is : Kw at 37 C = 2.5 * 10^-14

K_eq , pk_a , pH are independent on ionic strength for the reaction involving chared species

The conjugate base H₂PO^-₄is

The charge balance equation of 2 moles of Na₂SO₄ that is added into 1 L water is :

Calculate the pH of a solution of 510^-3 M C₆H₅COOH , k_a = 6.310^-5 in the presence of 0.05 M k₂SO₄ ( a_H = 9 Angstrom , a_C_6H5COO = 6 Angstrom )

The POH of 1*10^{-7 M solution of HCl is}

The ph of 0.1M solution of sodium acetate ( salt of weak acid ) NaOAC Kb = 5.7* 10^-10

110^-4 M of a weak electrolyte AB , dissociates to A⁺ & B^- with k_eq⁰ = 210^-8 . calculate the % dissociation in the presence of 0.1 M diverse salt ( f_A = 0.6 , f_B= 0.7 )

The pH, POH, [OH^-] respectively 2*10^-5 HNO₃

The POH of a solution prepared by adding 25 ml of 0.1 M NaOH to 30 ml of 0.2 M acetic acid ( HOAC ) Ka = 1.75 * 10^{-5
is :}