Acid (chemistry): a substance that donates hydrogen ions (H+); a general term for acidic substances used in chemical contexts.
硫酸や塩酸など強い酸は取り扱いに注意が必要だ。
Strong acids like sulfuric acid and hydrochloric acid require careful handling.
酸を中和するには塩基が必要だ。
A base is needed to neutralize an acid.
この溶液は酸性なので手袋を着けて作業してください。
This solution is acidic, so please wear gloves when handling it.
Sourness; the sour taste in food or drink — refers to acidity as a taste sensation.
レモンには強い酸があるので料理に風味を加える。
Lemons have strong acidity, which adds flavor to dishes.
このワインは適度な酸があって飲みやすい。
This wine has a moderate acidity and is easy to drink.