Base has formula [tex] Me(OH)_{x} [/tex].
Example of a base is a soap,
and it has a bitter taste, feels slippery to the touch.
From the formula we can see that a base has hydroxide ion (OH), so a base increases the concentration of hydroxide ions in an aqueous solution.
3. Reacts with active metals to produce hydrogen gas is not a property of the base; this is a property of acids.
