Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Medical
  • The solubility order for alkali metal fluoride in water is : Option: 1 LiF<RbF<KF<NaFOpti

The solubility order for alkali metal fluoride in water is : 

Option: 1

LiF<RbF<KF<NaF


Option: 2

RbF<KF<NaF<LiF


Option: 3

LiF>NaF>KF>RbF


Option: 4

LiF<NaF<KF<RbF


Answers (1)

best_answer

LiI > NaI > KI > RbI > Cal (solubility)
\text{Lattice energy }\alpha \ \frac{1}{r_{-} + r_{+}}
Since r- > r+ ? the sum will not change too much as r+? increases. As a result, the lattice energy will not change significantly as r+? increases. Thus decreases in lattice energy are not as fast as decreases in hydration energy. Thus, more decreases in hydration energy result in decrease insolubility. Thus, solubility decreases as 
LiI > NaI > KI > RbI > Cal
With a small anion as (F-) the lattice energy decreases more rapidly along with a series of salts with increasing cation size and thus solubility increases.
LiF < NaF < KF < RbF < CsF

Posted by

Gaurav

View full answer

NEET 2024 Most scoring concepts

    Just Study 32% of the NEET syllabus and Score up to 100% marks

Similar Questions

Trending Articles/News

anam-khan

NEET 2025 question paper pattern, NTA removes section B; quick revision tips
anam-khan

NEET UG 2025: Candidates to attempt 180 questions for 720 marks; marking scheme, exam duration
anam-khan

NTA identifies 106 Telegram, 16 Instagram channels spreading 'false' information on NEET

Latest Question