Answer:
Phosphate buffer system operates in the internal fluids of all cells. It consists of dihydrogen phosphate ions as the hydrogen ion donor ( acid ) and hydrogen phosphate ion as the ion acceptor ( base ) . ... If extra hydrogen ions enter the cellular fluid then they are neutralised by the hydrogen phosphate ion.
Explanation:
Atoms are neutral because they contain the same amount of protons and electrons. An electrically charged particle called an ion is produced when electrons are removed from a neutral atom to give a positive charge or when electrons are added to a neutral atom to give a negative charge. Since the number of protons and electrons are the same, the electric charges cancel one another making the atom neutral.
Answer:
Acid-base equilibrium.
Explanation:
At low temperatures the amines react with carboxylic acids as bases and not as nucleophiles. This acid-base reaction is disadvantageous on heating, with the nucleophilic attack that will form the amide prevailing under these conditions.