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  1. A dilute acid or base solution is therefore one that has much fewer acid or base molecules per dm 3 of solution, hence the pH value would lie between 5 and 9; It does not necessarily mean that the acid or base is strong as it may be made from a weak acid or base which does not dissociate completely but a lot of it was added to the solution

  2. Acids react with metals, bases and carbonates to produce salts. Neutralisation is the reaction between an acid and a base. Part of Combined Science Chemical changes

  3. Some acids contain two replaceable protons (called ' dibasic ') For example, H 2 SO 4 (sulfuric acid) has two ionisations. H 2 SO 4 acts as a strong acid: H2SO4 → H+ + SO4-. HSO 4- acts as a weak acid: HSO4- ⇌ H+ + SO42-. The second ionisation is only partial which is why the concentration of 1 mol dm -3 sulfuric acid is not 2 mol dm -3 in ...

  4. Jan 7, 2011 · pH. An acid dissociates into H + in solution according to: HA → H+ + A-. The stronger the acid, the greater the concentration of H+ and therefore the lowerthepH. pH value of a strong acid & base table. The most accurate way to determine the pH is by reading it off a pH meter. The pH meter is connected to the pH electrode which shows the pH ...

  5. Jul 4, 2022 · The most common strong bases are ionic compounds that contain the hydroxide ion as the anion; three examples are NaOH, KOH, and Ca (OH) 2. Common weak acids include HCN, H 2 S, HF, oxoacids such as HNO 2 and HClO, and carboxylic acids such as acetic acid. The ionization reaction of acetic acid is as follows:

  6. When a weak acid and a strong base are mixed, they react according to the following net-ionic equation: HA(aq) + OH⁻(aq) → A⁻(aq) + H₂O(l). If the acid and base are equimolar, the pH of the resulting solution can be determined by considering the equilibrium reaction of A⁻ with water. If the acid is in excess, the pH can be determined from the concentrations of HA and A⁻ after the ...

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  8. Jul 12, 2023 · Thus the conjugate base of a strong acid is a very weak base, and the conjugate base of a very weak acid is a strong base. The conjugate base of a strong acid is a weak base and vice versa. We can use the relative strengths of acids and bases to predict the direction of an acidbase reaction by following a single rule: an acidbase ...

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