Question

Bases when dissolved in water produce ______

Bases can be defined as substances that produce hydroxide ions when dissolved in water (OH^–).

Acids and bases

• An Arrhenius acid is any substance that ionizes when it dissolves in water to give the H⁺ or hydrogen.
• An Arrhenius base is any substance that gives the OH^–, or hydroxide, an ion when it dissolves in water.

Answer 1

Base —

• It has a bitter taste
• it feels slippery or soapy to touch
• it is either a metallic hydroxide or a metallic oxide or aqueous ammonia which reacts with an acid to form salt and water only
• it reacts with an acid to form a salt and water only

Arrhenius concept — a base is a substance that when dissolved in water gives hydroxyl { OH^-} ions as the only negative ion in the solution

• An Arrhenius base is any substance that gives the OH^–, or hydroxide, an ion when it dissolves in water.
• A chemical substance that tends to donate electrons, release hydroxide ions (OH– ions), and/or accept protons (H+ ions) when dissolved in water
• Bases are known to increase the hydroxide ion activity or reduce the hydronium ion activity when they are dissolved in aqueous media.

for example —

• $\mathrm{NaOH}$$\to$${\mathrm{Na}}^{+}$$+$${\mathrm{OH}}^{-}$
• $\mathrm{KOH}$$\to$${\mathrm{K}}^{+}$$+$${\mathrm{OH}}^{-}$