Solvation and Dissolution

Q.

Factors affecting solubility of a solid in a liquid

Q.

Which of the following alkaline earth metal nitrate does not crystalline with water of crystallization?

1. $\mathrm{Ca}{\left({\mathrm{NO}}_3\right)}_2$

2. $\mathrm{Mg}{\left({\mathrm{NO}}_3\right)}_2$

3. $\mathrm{Sr}{\left({\mathrm{NO}}_3\right)}_2$

4. $\mathrm{Ba}{\left({\mathrm{NO}}_3\right)}_2$

Q.

Question 38
Explain the solubility rule "like dissolves like" in terms of intermolecular forces that exist in solutions.

Q. What are ionic solid?

Q. 8 Which one of the following compounds can produce hydrogen when treated with metallic sodium (a)CH3NH2 (b)C6H5NH2 (c)(CH3)2NH (d)CH3CONH2

Q. Dissolution does not occur when covalent compounds are dissolved in covalent solvents like Benzene.

1. True
2. False

Q. measurement of the conductivity of ionic solutions

Q. Madam Curie was studying solution chemistry. She was reading that dissolution happens with ionic crystals in water where ions are separated and the salt gets dissolved.
She had some magnesium oxide (MgO) crystals lying around. Being a scientist, she decided to test it out. She tried to mix MgO with water but she observed that MgO did not mix with water. She was bewildered.
But she soon realized the reason.
What could be the reason?
Select from the following options:

1. Entropy of water was too high.
2. MgO was not ionic. Madam Curie was mistaken.
3. The lattice energy of MgO is higher than the hydration energy of water.

4. It would have dissolved if Madam Curie had given more time.

Q. When NH, OH reacts with unsymmetrical ketone then number of products formed is(1)4(2) 1 (3) 2 (4) 3

Q. Why ionic solids dissolve in water

Q.

how does temperature affects solubility of a substance? does it decrease or increase the solubility ?

Q. why z in bcc for density in ionic solids is 1?

Q. How to find out if a molecule is polar or non polar

Q.

Using IUPAC norms write the systematic names of the following:

(i) [Co(NH₃)6]Cl₃

(ii) [Pt(NH₃)₂Cl(NH₂CH₃)]Cl

(iii) [Ti(H₂O)6]³⁺

(iv) [Co(NH₃)₄Cl(NO₂)]Cl

(v) [Mn(H₂O)6]²⁺

(vi) [NiCl₄]²⁻

(vii) [Ni(NH₃)₆]Cl₂

(viii) [Co(en)₃]³⁺

(ix) [Ni(CO)₄]

Q. IUPAC name of K₄[Fe(CN)₆]
Cu₂[Fe(CN)6]

Q. Madam Curie was studying solution chemistry. She was reading that dissolution happens with ionic crystals in water where ions are separated and the salt gets dissolved.
She had some magnesium oxide (MgO) crystals lying around. Being a scientist, she decided to test it out. She tried to mix MgO with water but she observed that MgO did not mix with water. She was bewildered.
But she soon realized the reason.
What could be the reason?
Select from the following options:

1. Entropy of water was too high.
2. MgO was not ionic. Madam Curie was mistaken.
3. The lattice energy of MgO is higher than the hydration energy of water.

4. It would have dissolved if Madam Curie had given more time.

Q.

Ionic solids are soluble in water because of the process of dissolution.

1. True
2. False

Q.

Calamine is an ore of

1. Hg

2. Zn

3. Cd

4. Ca

Q. Which of the following factors influences the magnitude of vander waal forces:

1. Source of isolation of compound
2. Molecular Size
3. Both A and B
4. None of the above

Q.

Ionic solids are soluble in water because of the process of dissolution.

1. True
2. False

Q.

What is hydrophilic sol? Why are they stable?

Q. Are salts ionic ??

Q.

describe the preparation of k₂cr₂o₇ from chromite ore and explain the reaction of k₂cr₂o₇ with acid FeSo₄ , KI and H₂S ?

Q. Statement 1: Ionic compounds only dissolve in water.
Statement 2: Hydration is the process of dissolving an ionic solid in water.

1. Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1
2. Both Statement 1 and Statement 2 are correct, but Statement 2 is not the correct explanation of Statement 1.
3. Statement 1 is correct, but Statement 2 is not correct.
4. Statement 1 is not correct, but Statement 2 is correct.

Q.

Calamine is an ore of

1. Hg

2. Zn

3. Cd

4. Ca

Q. Why ionic solid dont have simple cubic packing?

Q.

Using IUPAC norms write the formulas for the following:

(i) Tetrahydroxozincate(II)

(ii) Potassium tetrachloridopalladate(II)

(iii) Diamminedichloridoplatinum(II)

(iv) Potassium tetracyanonickelate(II)

(v) Pentaamminenitrito-O-cobalt(III)

(vi) Hexaamminecobalt(III) sulphate

(vii) Potassium tri(oxalato)chromate(III)

(viii) Hexaammineplatinum(IV)

(ix) Tetrabromidocuprate(II)

(x) Pentaamminenitrito-N-cobalt(III)

Q. In cold countries __________ is used as an anti-freezing agent in the radiator of the car.

1. ethylene
2. water
3. alcohol
4. ethylene glycol

Q. Dissolution does not occur when covalent compounds are dissolved in covalent solvents like Benzene.

1. False
2. True

Q. Assertion :For all the salts completely soluble in water, the magnitude of the sum of enthalpies of hydration of ions is greater than the magnitude of lattice enthalpy of the salt. Reason: If the magnitude of the sum of enthalpies of hydration of ions is less than the lattice enthalpy of the salt, the salt is completely insoluble in water.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect