Advertisements
Advertisements
प्रश्न
Why sodium hydroxide is much more water soluble than sodium chloride?
Advertisements
उत्तर
\[\ce{NaOH + H2O ⇌ Na^+ + OH^-}\]
- 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
संबंधित प्रश्न
Which of the following has the highest tendency to give the reaction
\[\ce{M^+_{(g)} ->[Aqueous][Medium] M^+_{(aq)}}\]
Sodium is stored in _________.
RbO2 is _________.
Match the flame colours of the alkali and alkaline earth metal salts in the bunsen burner
| (p) Sodium | (1) Brick red |
| (q) Calcium | (2) Yellow |
| (r) Barium | (3) Violet |
| (s) Strontium | (4) Apple green |
| (t) Cesium | (5) Crimson red |
| (u) Potassium | (6) Blue |
The compound (X) on heating gives a colourless gas and a residue that is dissolved in water to obtain (B). Excess of CO2 is bubbled through aqueous solution of B, C is formed. Solid (C) on heating gives back X. (B) is
Among the following the least thermally stable is
Write a balanced chemical equation for the following chemical reaction.
Lithium metal with nitrogen gas
Give the systematic name for the following.
Lye
Give the systematic name for the following.
Washing soda
Give the systematic name for the following.
Trona
