1) What is the standard state of A in a mixture of 5% A and 95% B (A and B are b

Question

1) What is the standard state of A in a mixture of 5% A and 95% B (A and B are both volatile liquids)?

A)A hypothetical state with activity equal to 1 but no interactions

B) Pure liquid A

C) Pure liquid B

D)A solution where the activity of a was 1

2)Why does the conductivity of a strong electrolyte like NaCl decrease with increasing concentration

A)NaCl is not completely dissociated

B)The 'drag' of the ionic atmosphere increases with concentration

C)As concentration increases, ions start to pair up

D)The molar conductivity is found by dividing the conductivity by the concentration so as concnetration increase it is expected that molar conductivity would decrease

3)The transport number of H+ in a HCl solution is 0.815. Why does the hydrogen ion carry such a high proportion of the currrent?

A)The hydrogen ion has a positive charge

B)The hydrogen ion is smaller than the chloride ion

C)The proton can effectively move by moving electrons

D)he chloride ion is heavier

4)The Debye-Huckel law is referred to as a limiting law. Which of the following assumptions used to derive the law would break down first as the ionic strength is increased?

A)each ion surrounded by an ionic atmosphere of oppositely charged ions

B)Electrolytes are completely dissociated

C)Ions have negligible size

D)Departures from ideality solely due to electrostatic interactions

Explanation / Answer

Q1. Answer is A

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