HNO3 has a Ka value of roughly 24. The chemical formula for concentrated nitric acid is HNO3. The acid dissociation equilibrium constant, often known as the Ka value, is a metric for how acidic a solution is.
Strong acids with a Ka value higher than one include HNO3. Weak acids are those with a Ka value below one, such as boric acid, which has a Ka value of around 7.3 x 105. (-10). A logarithmic function is used to connect an acid’s Ka value to its pH value. The Ka value indicates how much an acid dissociates when dissolved in water.