is a base from by hydroxide ions?

Question

and i have other ones to and if you can help me plz give me your email and help me plz and thank you

Answer 1

There are two ways to define bases.

1
They are inorganic compounds which give negatively charged OH- anions (hydroxyl anions) which can react with cations in a solution. If nothing to react with, they just rise the concentration of hydroxyl anions [OH-] in the water solution. This leads to the rise of pH: if there is 10 times more hydroxyl anions than protons (causing acidity), pH = 8; if 100 times, pH is 9 e.t.c. An example: NaOH.

2
Organic compounds can also act like bases: they can take protons (H+) from other compounds. We can say that they decrease the amount of acidic groups in other compounds in this way. Examples of this group of compounds are nitrogen-containing alkaloids (nicotine e.t.c.) which can react like bases with organic acids, forming salts. No effect on pH in the environment, just a reaction between organic base and organic acid.

Answer 2

Bases can be defined many ways but generally,
Ionic compounds that contain the hydroxyl are bases.
Covalent compound with the hydroxyl ion can be alcohols.

Answer 3

The presence of hydroxide ions (OH-) results in the basicity of a substance, ie the pH becomes higher than 7.

e.g. NaOH (aq) => Na+ + OH- (very basic)
e.g. NH3 (aq) <=> NH4+ + OH- (not so basic)