Chemistry - ch-5

def

Q: What is an Arrhenius acid?

Arrhenius acid is any substance that dissociates to produce hydrogen ions (H+) when it dissolves in water

Q: What is an Arrhenius base?

Arrhenius base is any substance that dissociates to produce hydroxide ions (OH-) when it dissolves in water

Q: What is a Bronsted-Lowry acid?

Bronsted-Lowry acid is any substance that can donate a proton

Q: What is a Bronsted-Lowry base?

Bronsted-Lowry base is any substance that can accept a proton

Q: What is a conjugate acid?

Conjugate acid is a species that forms when a base gain a proton

Q: What is a conjugate base?

Conjugate base is a species that forms when an acid loses a proton

Q: What is a conjugate acid-base pair?

Conjugate acid-base pair is an acid-base pair that consists of either an acid and its conjugate base or a base and its conjugate acid

Q: What is a Lewis acid?

Lewis acid is any substance that can accept an electron pair

Q: What is a Lewis base?

Lewis base is any substance that can donate an electron pair

Q: What is the autoionisation of water?

Autoionisation of water is a reaction between two water molecules yielding hydronium and hydroxide ions

Q: What are amphiprotic molecules?

Amphiprotic molecules is one which can have both proton-accepting (protophilic) and proton-donating (protogenic) properties

Q: What is the ionic product of water?

Ionic product of water is the equilibrium constant for the autoionization of water which is the product of the molar concentrations of H+ and OH- ions at a particular temperature

Q: What is a neutral aqueous solution?

Neutral aqueous solution is one which the concentrations of hydrogen ions and hydroxide ions are equal at the value of 10×10^-7 mol dm^-3 at 25℃ (298 K) (pH = 7)

Q: What is pH?

pH is defined as the negative logarithm to base 10 of the molar concentration of the hydrogen ions

Q: What is pOH?

pOH is defined as the negative logarithm to the base 10 of the molar concentration of the hydroxide ions

Q: What are strong acids?

Strong acids are strong electrolytes that completely ionize in water

Q: What are weak acids?

Weak acids are weak electrolytes that partially ionize only to a limited extent in water

Q: What are strong bases?

Strong bases are strong electrolytes that ionize completely in water

Q: What are weak bases?

Weak bases are weak electrolytes that ionize to a very limited extent in water

Q: What is basicity of the acid?

Basicity of an acid is the number of hydrogen ions that one molecule of an acid can produce

Q: What is acidity of the base ?

Acidity of a base is the number of molecules of a monoprotic acid that will neutralize one molecule of the base

what is Acid dissociation constant (K_a)?

Acid dissociation constant (K_a) is the equilibrium constant for a weak acid.

What is Base dissociation constant (K_b)

Base dissociation constant (K_b) is the equilibrium constant for a weak base.

What is Salt hydrolysis?

Salt hydrolysis is the reaction of an anion or a cation of salt, or both, with water.

What is Buffer solution?

Buffer solution is a solution that resists change in pH as a result of dilution or a small addition of acids or bases.