Home
Class 12
CHEMISTRY
The solubility of alkli metals salts in ...

The solubility of alkli metals salts in water is due to the fact that the cations get hydrated by water molecules. The degree of hydration depends upon the size of the cation. If the trend of relative ionic radii is `Cs^(+) gt Rb^(+) gt K^(+) gt Na^(+) gt Li^(+) `.
What is the relative degree of hydration?

A

`Ca_((aq))^(+)gt Rb_((aq))^(+) gt K_((aq))^(+) gt Na_((aq))^(+) gt Li_((aq))^(+)`

B

`Li_((aq))^(+) gt Na_((aq))^(+)gt K_((aq))^(+) gt Rb_((aq))^(+) gt Cs_((aq))^(+)`

C

`Na_((aq))^(+) gt K_((aq))^(+) gt Rb_((aq))^(+) gt Cs_((aq))^(+)gt Li_((aq))^(+)`

D

`Cs_((aq))^(+) gt Na_((aq))^(+) gt Li_((aq))^(+) gt K_((aq))^(+) gt Rb_((aq))^(+)`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • NTA JEE MOCK TEST 62

    NTA MOCK TESTS|Exercise CHEMISTRY|25 Videos

  • NTA JEE MOCK TEST 64

    NTA MOCK TESTS|Exercise CHEMISTRY|25 Videos

Similar Questions

Explore conceptually related problems

Alkali metal salts ionic and soluble in water. The solubility of an ionic compound depends on (i) lattic ethalpy and (ii) hydration enthalpy. These two factor oppose each other. If hydration ethalpy is high, the ions will have greater tendency to be hydrated and therefore the solubility will be high. The smaller the cation, the greater is the degree of hydration. The reducing behaviour of alkali metals in solution is also dependent on the hydration enthalpy besides other factors. The ionic mobility of Li^(o+) is less than of the Na^(o+) ion in solution because

Alkali metal salts ionic and soluble in water. The solubility of an ionic compound depends on (i) lattic ethalpy and (ii) hydration enthalpy. These two factor oppose each other. If hydration ethalpy is high, the ions will have greater tendency to be hydrated and therefore the solubility will be high. The smaller the cation, the greater is the degree of hydration. The reducing behaviour of alkali metals in solution is also dependent on the hydration enthalpy besides other factors. The radius of which of the hydrated ion is the highest ?

Alkali metal salts ionic and soluble in water. The solubility of an ionic compound depends on (i) lattic ethalpy and (ii) hydration enthalpy. These two factor oppose each other. If hydration ethalpy is high, the ions will have greater tendency to be hydrated and therefore the solubility will be high. The smaller the cation, the greater is the degree of hydration. The reducing behaviour of alkali metals in solution is also dependent on the hydration enthalpy besides other factors. The hydration energy is maximum for

Alkali metal salts ionic and soluble in water. The solubility of an ionic compound depends on (i) lattic ethalpy and (ii) hydration enthalpy. These two factor oppose each other. If hydration ethalpy is high, the ions will have greater tendency to be hydrated and therefore the solubility will be high. The smaller the cation, the greater is the degree of hydration. The reducing behaviour of alkali metals in solution is also dependent on the hydration enthalpy besides other factors. Which of the following is the strongest reducing agent

The atomic radill of alkali meals (M) lie in the order Li lt Na lt K lt Rb, but the radii of M^(+) ions in aqueous solution lie in the reverse order Li^(+) gt Na^(+) gt Rb^(+). What is the reason for this reverse order (on going from Li to Rb)

Zeolites is the name given to some aluminesllicates of metals with the genral formula [M_(x//n )(AlO_(2))_(x)(SiO_(2))_(3)] zH_(2)O , where n is the charge on the metal cation while z is the number of molecules of water hydration present. The metal cations participating in the zeolite formation are usually Na^(+),K^(+) or Ca^(2+) . the zeolites in the hydrated form are used as ion-exchanges in removing hardness of water. However. if these are heated in vacuum for sometime, they low the molecules of water and get dehydrated . pores or cavities are formed at the places wehre H_(2)O molecules were present. Thus, they become highly porous and can act as catalysis in certain reactions. (i) Why are zeolites called shape-selective catalysis? (ii) What is the value associated with zeolites?

The colloidal particles are electrically charged as a indicated by their migration towards cathode or anode under the applied electric field. In a particular colloidal system, all particles carry either positive charge or negative charge. The electric charge on colloidal particles orginate in several ways. According to preferential adsorption theory, the freshly obtained precipitate particles adsorb ions from the dispersion medium, which are common to their lattice and acquire the charge of adsorbed ions. For example, For example, freshly obtained Fe(OH)_(3) precipitated is dispersed, by a little FeCl_(3) , into colloidal solution owing to the adsorption of Fe^(3+) ions in preference. Thus sol particles will be positively charged. In some cases the colloidal particles are aggregates of cations or anions having ampiphilic character. When the ions posses hydrophobic part (hydrocarbon end) as well as hydrophilic part (polar end group), they undergo association in aqueous solution to form particles having colloidal size. The formation of such particles, called micelles plays a very important role in the solubilization of water insoluble substances, (hydrocarbon, oils, fats, grease etc.). In micelles, the polar end groups are directed towards water and the hydrocarbon ends into the centre. The charge on sol particles of proteins depends on the pH. At low pH, the basic group of protein molecule is ionized (protonated) and at higher pH (alkaline medium), the acidic group is ionized. At isoelectric pH, characteristic to the protein, both basix and acidic groups are equally ionized. The stability of colloidal solution is attributed largely to the electric charge of the dispersed particles. This charge causes them to be coagulated or precipitated. On addition of small amount of electrolytes, the ions carrying oppiste charge are adsorbed by sol particles resulting in the neutralization of their charge. When the sol particles either with no charge or reduced charge, come closer due to Brownian movement, they coalesce to form bigger particles resulting in their separation from the dispersion medium. This is what is called coagulating or precipitation of the colloidal solution. The coagulating power of the effective ion, which depend on its charge, is expressed in terms of its coagulating value, defined as its minimum concentration (m mol/L) needed to precipitate a given sol. Under the influence of an electric field, the particles in a sol migrate towards cathode. The coagulation of the same sol is studied using NaCl, Na_(2)SO_(4) and Na_(3)PO_(4) solutions. Their coagulating values will be in the order :

Knowledge Check

  • The solubility iof alkali metal salts in water is due to the fact that the cations get hydrated by water molecules. The degree of hydration depends upon the size of the cation. If the trend of relative ionic radii is Cs^(+) gt Rb^(+) gt K^(+) gt Na^(+) gt Li^(+). What is the relative degree of hydration ?

    A
    `Cs_((aq))^(+) gt Rb_((aq))^(+) gt K_((aq))^(+) gt Na_((aq))^(+) gt Li_((aq))^(+)`
    B
    `Li_((aq))^(+) gt Na_((aq))^(+) gtK_((aq))^(+) gt Rb _((aq))^(+) gt Cs_((aq))^(+)`
    C
    `Na_((aq))^(+) gt K _((aq))^(+) gt Rb _((aq))^(+) gt Cs_((aq))^(+) gt Li_((aq))^(+)`
    D
    `Cs_((aq))^(+) gt Na_((aq))^(+) gt Li_((aq))^(+) gt K_((aq))^(+) gt Rb_((aq))^(+)`

  • Alkali metal salts ionic and soluble in water. The solubility of an ionic compound depends on (i) lattic ethalpy and (ii) hydration enthalpy. These two factor oppose each other. If hydration ethalpy is high, the ions will have greater tendency to be hydrated and therefore the solubility will be high. The smaller the cation, the greater is the degree of hydration. The reducing behaviour of alkali metals in solution is also dependent on the hydration enthalpy besides other factors. The ionic mobility of Li^(o+) is less than of the Na^(o+) ion in solution because

    A
    `Li^(o+)` ion has a high charge density.
    B
    `Li^(o+)` ion has the highest hydration tendency.
    C
    `Li^(o+)` ion has the highest ionisation enthalpy.
    D
    `Li^(o+)` ion has two electrons.

  • Alkali metal salts ionic and soluble in water. The solubility of an ionic compound depends on (i) lattic ethalpy and (ii) hydration enthalpy. These two factor oppose each other. If hydration ethalpy is high, the ions will have greater tendency to be hydrated and therefore the solubility will be high. The smaller the cation, the greater is the degree of hydration. The reducing behaviour of alkali metals in solution is also dependent on the hydration enthalpy besides other factors. The radius of which of the hydrated ion is the highest ?

    A
    `Li_((aq))^(o+)`
    B
    `Na_((aq))^(o+)`
    C
    `K_((aq))^(o+)`
    D
    `Rb_((aq))^(o+)`
    • NTA MOCK TESTS-NTA JEE MOCK TEST 63-CHEMISTRY
    1. The solubility of alkli metals salts in water is due to the fact that ...

      Text Solution

      |

    2. Fill in the blanks : (i) Ca(3)P(2)+6HClrarr 3CaCl(2) + ....p .... ...

      Text Solution

      |

    3. Match the column I with Column II and mark the appropriate choice.

      Text Solution

      |

    4. Match the column I with Column II and mark the appropriate choice.

      Text Solution

      |

    5. Monoclinic sulphur is an example of monoclinic cystal system. What are...

      Text Solution

      |

    6. Which of the plots is adsorption isobar for chemisorption?

      Text Solution

      |

    7. Select the correct option, among Sc(III) , Ti(IV), Pd(II) and Cu(II) i...

      Text Solution

      |

    8. Consider the following bromides The correct order of S(N)1 reacti...

      Text Solution

      |

    9. Dehydration of the following in increasing order is

      Text Solution

      |

    10. The half-life for radioactive decay of .^(14)C is 5730 years . An arch...

      Text Solution

      |

    11. Complete the missing links CH(3)CHBrCH(3) overset("alc. KOH")rarr Xo...

      Text Solution

      |

    12. The freezing point of 1 molal NaCl solution assuming NaCl to be 100% d...

      Text Solution

      |

    13. {:(COOH),(|),(COOH):}overset(NaOH)rarr X, The product (X) will be

      Text Solution

      |

    14. NaBH(4)+I(2)rarr X+Y+Z BF(3)+LiAlH(4) overset("450 K")rarr X+P BF(...

      Text Solution

      |

    15. In the following reaction, The organic product X has the structur...

      Text Solution

      |

    16. Which of the following are arranged in the decreasing order of dipole ...

      Text Solution

      |

    17. Study the structure of maltose and mark the incorrect statement.

      Text Solution

      |

    18. Work done on a ideal gas in a cylinder when it is compressed by an ext...

      Text Solution

      |

    19. Sometimes it is possible to separate two sulphide ores by adjusting th...

      Text Solution

      |

    20. Match the atomic numbers of the elements given in column I with the pe...

      Text Solution

      |