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Sakshi Naik
Subject: Chemistry
, asked on 26/11/17
Pls solve illustration 7 with appropriate solution
Illustration 6.
Which of the following concentration has the largest degree of dissociation for a weak acid?
(A) 1.0 M
(B) 0.5 M
(C) 0.10 M
(D) 0.01 M
Solution: (D)
Answer
2
Ekta Ray
Subject: Chemistry
, asked on 26/11/17
Q- ​What is the pH of the solution when 0.20 mole NaOH is added to one litre of a solution containing one
mole each of
NH
3
and
NH
4
Cl
?
K
b
for
NH
3
is
1
.
8
×
10
-
5
.
Assume the total volume remains one litre.
Answer
1
Ekta Ray
Subject: Chemistry
, asked on 24/11/17
Q. Which out of the following pairs is acid according to Arrhenius concept ?
(i) HCl (g) and HCl (aq)
(ii) CH
3
COOH (
l )
and CH
3
COOH (aq)
Answer
1
Kay.
Subject: Chemistry
, asked on 23/11/17
Derive the expression for ionisation constant for a base
Answer
1
Arshia Sharma
Subject: Chemistry
, asked on 21/11/17
Example 14 plz
Q Example 14.
Calculate the per cent dissociation of H
2
S(g) if 0.1 mole of H
2
S is kept in 0,4 litre vessel at 1000 K for the reaction ,
2H
2
S(g)
⇌
2H
2
(g) + S
2
(g)
The value of K
c
is 1.0 × 10
–6
Answer
1
Arshia Sharma
Subject: Chemistry
, asked on 21/11/17
Example 14 plz
Q Example 14.
Ammonium hydrogen sulphide dissociates according to the equation:
NH
4
HS (s)
⇌
NH
3
(g) + H
2
S (g)
If the observed pressure at equilibrium is 1.12 atm at 380K, what is the equilibrium constant K
p
of the reaction ?
Answer
1
Arshia Sharma
Subject: Chemistry
, asked on 20/11/17
What is the pH of the solution when 0.2 mole of hydrochloric acid is added to one litre of a solution containing 1 M acetic acid and acetate ion? Assume that the total volume is one litre. (K
a
for CH
3
COOH = 1.8 × 10
–5
)
Answer
1
Arshia Sharma
Subject: Chemistry
, asked on 20/11/17
At 817°C, K
p
for the reaction between CO
2
(g) and excess of hot graphite (s) is 10 atm.
(a) What are the equilibrium concentrations of the gases at 817° C and a total pressure of 5 atm?
(b) At what total pressure does the gas contain 5% CO
2
by volume?
Answer
1
Ekta Ray
Subject: Chemistry
, asked on 16/11/17
How many lone pairs of electrons in OH^- ?
Answer
1
Shreya Choudhary
Subject: Chemistry
, asked on 15/11/17
calculate solubility product of Hg2cl2 if its solubility at room temperature is 2?10^-3mol /L
Answer
1
Shreya Choudhary
Subject: Chemistry
, asked on 15/11/17
The dissociation constant of a weak acid HA and weak base BOH are 2?10-5?and 5?10-6?respectively.The equilibrium constant for the neutralization reaction of the two is ( ignore hydrolysis of resulting salt)
Answer
1
Shreya Choudhary
Subject: Chemistry
, asked on 15/11/17
Solve this:
Answer
1
Shreya Choudhary
Subject: Chemistry
, asked on 15/11/17
The compound whose 0.1 M solution is basic is 1 . Ammonium acetate 2 . Ammonium chloride 3 . Ammonium sulphate 4 . sodium acetate... Explain how ans is 4
Answer
1
Shreya Choudhary
Subject: Chemistry
, asked on 14/11/17
ionization constant of base (C2 h5)3N is 6.4 ?10^-5calculate its degree of dissociation in 0.1 M solution when it is mixed with 0.01 M solution plz.explain if initial concentration is already given as 0.1M then why are we reconsidering it as c?
Answer
1
Shreya Choudhary
Subject: Chemistry
, asked on 14/11/17
calculate the degree of hydrolysis and pH of NH4CN at 298 degree centigrade given K A equals to 4.99 ?10 to the power minus 9 and KB equals to 1.77 ?10 to the power minus 5
Answer
1
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What are you looking for?
Illustration 6. Which of the following concentration has the largest degree of dissociation for a weak acid?
(A) 1.0 M
(B) 0.5 M
(C) 0.10 M
(D) 0.01 M
Solution: (D)
mole each of Assume the total volume remains one litre.
(i) HCl (g) and HCl (aq)
(ii) CH3COOH (l ) and CH3 COOH (aq)
Q Example 14. Calculate the per cent dissociation of H2S(g) if 0.1 mole of H2S is kept in 0,4 litre vessel at 1000 K for the reaction ,
2H2S(g) 2H2(g) + S2(g)
The value of Kc is 1.0 × 10–6
Q Example 14. Ammonium hydrogen sulphide dissociates according to the equation:
NH4 HS (s) NH3(g) + H2 S (g)
If the observed pressure at equilibrium is 1.12 atm at 380K, what is the equilibrium constant Kp of the reaction ?
(a) What are the equilibrium concentrations of the gases at 817° C and a total pressure of 5 atm?
(b) At what total pressure does the gas contain 5% CO2 by volume?