Question

define the following:
pH,Neutralization and Alkali

Answer 1

hey mate here is ur ans
Ph the scale used to determine the acidity or basidity of an object


Nutrilisation:-
when acid react with base and form salt and water is called nutrilisation.

Alkali:-
the base which is soluble in water is called alkali.

Answer 2

pH=In chemistry, pH (/piːˈeɪtʃ/) is a logarithmic scale used to specify the acidity or basicity of an aqueous solution. It is approximately the negative of the base 10 logarithm of the molar concentration, measured in units of moles per liter, of hydrogen ions. More precisely it is the negative of the base 10 logarithm of the activity of the hydrogen ion.Solutions with a pH less than 7 are acidic and solutions with a pH greater than 7 are basic. Pure wateris neutral, at pH 7 (25 °C), being neither an acid nor a base. Contrary to popular belief, the pH value can be less than 0 or greater than 14 for very strong acids and bases respectively.

Neutralisation=Meaning of "neutralization"

In the context of a chemical reaction the term neutralization is used for a reaction between an acidand a base or alkali. Historically, this reaction was represented as

acid + base(alkali) → salt + water

For example:

HCl + NaOH → NaCl + H2O

The statement is still valid as long as it is understood that in an aqueous solution the substances involved are subject to dissociation, which changes the substances ionization state. The arrow sign, →, is used because the reaction is complete, that is, neutralization is a quantitative reaction. A more general definition is based on Brønsted–Lowry acid–base theory.

AH + B → A + BH

Electrical charges are omitted from generic expressions such as this, as each species A, AH, B, or BH may or may not carry an electrical charge. Neutralization of sulphuric acid provides a specific example. Two partial neutralization reactions are possible in this instance.

H2SO4 + OH− → HSO4−+ H2OHSO4− + OH− → SO42−+ H2OOverall: H2SO4 + 2OH− → SO42−+ 2H2O

ALKALI=A solution of a soluble base has a pH greater than 7.0. The adjective alkaline is commonly, and alkalescent less often, used in English as a synonymfor basic, especially for bases soluble in water. This broad use of the term is likely to have come about because alkalis were the first bases known to obey the Arrheniusdefinition of a base, and they are still among the most common bases.