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A base donates hydroxide ions (OH-) into solution.
It does not contain any Ions It does contain ions. The point is that the positive (H) and negative (OH) ions are equal in concentration.
Alkaline are hydroxides of metals like sodium,potassium and a base substance that accepts protons such as hydroxide ion (OH -) - a negative ion. As a negative ion it accepts the positive ions of H+ and all metals with positive ions to neutral and produce salt and water.
Negative ions go to a positive electrode.
No, having a negative number in an equation does not necessarily mean the solution is acidic. The acidity or basicity of a solution is determined by the concentration of hydrogen ions (H+) or hydroxide ions (OH-) present, not by the sign of a number in an equation.