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CHEM0709010
Acids are proton donor.
Acids form hydroxonium ions when dissolved in water.
Bases that soluble in water are called alkalis.
Alkalis are chemical substance that ionize in water to produce hydroxide ions.
No hydrogen ions are present in an alkali.
The oxides of metals are generally acidic.
The higher the concentration of hydrogen ions in a solution, the lower the pH value of the solution.
Hydrochloric acid react with copper produces copper(II) chloride salt and hydrogen gas.