Question

What is the pen ink is a acid or
base​

Answer 1

Answer:

Safety of ink can be based on a pH value (1-14), with 7 being neutral and the most safe for pens. Less than 7 is acidic and more corrosive as it gets toward the lower end

Explanation:

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Answer 2

Explanation:

Phenolphthalein is slightly soluble in water and usually is dissolved in alcohols for use in experiments. It is a weak acid, which can lose H+ ions in solution. The phenolphthalein molecule is colorless, and the phenolphthalein ion is pink. When a base is added to the phenolphthalein, the equilibrium shifts, leading to more ionization as H+ ions are removed. This is predicted by Le Chatelier's principle.