Advertisements
Advertisements
Question
Why sodium hydroxide is much more water soluble than sodium chloride?
Advertisements
Solution
\[\ce{NaOH + H2O ⇌ Na^+ + OH^-}\]
- This reaction is an exothermic reaction. Sodium hydroxide being a strong base, completely dissociated in the aqueous medium. The heat evolved increases the stability. This phenomenon is strong enough to prove that sodium hydroxide crystals are readily dissolved in water.
- NaCl is geologically stable. If kept dry, it will remain a free-flowing solid for years. Water can dissolve NaCl because the Na+ ions are attracted by OH– in water and Cl– ions are attracted by H+ in water. The solubility of NaCl does not increase the temperature. Based on this, NaOH is much more soluble due to its exothermic nature than sodium chloride.
APPEARS IN
RELATED QUESTIONS
Which of the following compounds will not evolve H2 gas on reaction with alkali metals?
Sodium is stored in _________.
RbO2 is _________.
In which process, fused sodium hydroxide is electrolysed for the extraction of sodium?
Which is the correct sequence of solubility of carbonates of alkaline earth metals?
An alkali metal (x) forms a hydrated sulphate, \[\ce{X2SO4.10H2O}\]. Is the metal more likely to be sodium (or) potassium?
Write a balanced chemical equation for the following chemical reaction.
heating solid sodium bicarbonate
Write a balanced chemical equation for the following chemical reaction.
solid potassium hydroxide with CO2
Give the systematic name for the following.
Washing soda
Give the systematic name for the following.
Soda ash
