Please explain your choice for every answer! These are call conceptual but make

ID: 784484 • Letter: P

Question

Please explain your choice for every answer! These are call conceptual but make sure you get it right

1. Which of the following does not have higher exp. S (entropy) than calculated S

in pure H20

a. CaCO3 b. AgCl c. PbSo4 d. MgF2

2. Consider the reaction:

NH3(aq) + H20(l)---- NH4(aq) = OH(aq)

a. the NH3 is acting as an Arrhenius base and a B.L. acid

b. the H20(l) is acting as both a B.L. acid and B.L. base

c. The NH3 is acting as an Arrhenius base and a B.L. base

d. The NH3 is acting as a B.L. base and its conj. acid is OH

3. Which of the following effects is explained through ion pairing

a. Diverse ion b. Common ion c. Uncommon ion d. Both a. & c.

4. For any spontaneous process

a. Delta Suniverse > 0 b. Delta Suniverse < 0 c. Delta G < 0 d. both (a) and (c)

iam posting my answer again ....to explain you everything ...please rate 5stars ...doubts are welcome

1)MgF2 is the answer because

in water MgF2 becomes ===== Mg + 2F-

ksp =(s)(2s)^2

so the value of ksp is becoming cube root other salts have onlt square roots

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2) Answer iS D

Lowry base is defined as anything that accepts H1+ ions

in the above reaction H+ is accepted by NH3 becoming NH4+

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3)Answer is D

ion paring is generally explaianed in solvents ...

common ion is explained in solvents when common ion regarding to salts is present...but io pairing is irrespective of common ion

4) answer =d. both (a) and (c)

For any system entropy of the universe must be increasing for it to be spontaneous ....

free energy must be negative

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