12) (a) ??????
MORE THAN ONE CORRECT
Q1 active mass =
a)a=f.Cm
b)a=r.Cm
c)Amount of substance per unit volume
d)No. of moles per unit litre
Q2 consider eq eqn
CH3COOH +HF <---->CH3COOH2 - +F -
a)F- is conj base of HF
b)F- is conj base of CH3COOH
c)CH3COH2- is conj base of CH3COOH
d)CH3COOH is conj acid of CH3COOH2+
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9 Answers
106Q2. CH3COOH2+ i.e. CH3COOH+(H+) .. addition of H+ is equivalent to removal of OH- .. so Ch3CooH2+ si the conjugate acid of CH3COOH
CH3COOH2+ removal of H+ --> CH3CoOH so CH3COOH is conjugate base of CH3COOH2+
HF removal of H+ --> F- so F- is conjugate base of HF
So, only (a)
Q1. (not in syllabus)
24arre yehi to dbt hai
ans 2 is given as b,c,d which i am sure is wrong.....isnt it ?
106are u sure the question was which of them are correct or which of them are worng?
19at a given temperature, rate of a reaction is directly proportional to the active mass of the reactant
active mass = concentration * activity coefficient
=>a=c*f
(f) is a measure of non ideality , for ideal system f=1
for ideal solution, a=[molar concentration]
for pure liquid and solid, a=1
for ideal gas,a=partial pressure
21ans-1) it should be a) only as in other cases it is only valid for ideal solutions.
ans-2)it should be a) only as HF is stonger than acetic acid.
24ans1=a,b
ans sorry i misread the ques2...it is "incorrrect" and not "correct"