On the pH scale, a value of 7 represents neutrality, where the concentration of hydrogen ions equals the concentration of hydroxide ions.

The reaction between an acid and a metal carbonate always yields a salt, water, and carbon dioxide gas.

Magnesium hydroxide (Milk of Magnesia) is a mild base used as an antacid to neutralize excess hydrochloric acid in the stomach.

Arrhenius defined acids as substances that increase the concentration of hydrogen ions (H+) in an aqueous solution.

Ammonium chloride is a salt formed from a strong acid (HCl) and a weak base (NH4OH), making its solution acidic.

Blue litmus paper turns red in the presence of an acidic medium.

Sodium hydroxide (NaOH) is a strong alkali because it dissociates completely into ions in water.

Neutralization is a chemical reaction in which an acid and a base quantitatively react to form salt and water.

The standard pH scale ranges from 0 to 14, where 0 is highly acidic and 14 is highly basic.

Sulfuric acid (H2SO4) is a diprotic acid, meaning it can donate two protons per molecule in aqueous solution.

The Brønsted-Lowry theory defines a base as any species that accepts a proton (H+ ion).

If pH is 3, pOH is 11 (14-3). The [OH-] concentration is 10^-pOH, which equals 10^-11 M.

Phenolphthalein is a pH indicator that is colorless in acidic conditions and turns bright pink/magenta in alkaline conditions (pH > 8.2).

Metal oxides are basic; their reaction with acids is a neutralization reaction that produces salt and water.

BF3 acts as a Lewis acid because it accepts an electron pair, but it does not have a proton to donate, so it is not a Brønsted-Lowry acid.

The neutralization of NaOH and H2SO4 produces sodium sulfate (Na2SO4) and water.

Salts resulting from a weak acid and strong base are basic in nature because the conjugate base of the weak acid undergoes hydrolysis.

A conjugate acid is formed when a base gains a proton. Adding H+ to NH3 results in the ammonium ion (NH4+).

Sodium hydroxide (caustic soda) is a strong base used in the process of saponification to manufacture soap.