2023 · Q70
Consider the following statements: While diluting concentrated nitric acid solution
- 1the concentration of [H3O+ ions/volume increases
- 2water must be added slowely to concentrated acid
- 3acid must be added slowly to water Which of the statements given above is/are correct?
General KnowledgeChemistry
- A1, 2 and 3
- B1 and 2 only
- C3 only
- D2 and 3 only
Explanation
Statement 1 is false: diluting an acid lowers the concentration of H3O+ ions per unit volume (more H3O+ ions exist in total, but spread through more water). Statement 2 is false and dangerous: water must never be added to concentrated acid, as the exothermic hydration can cause violent splashing. Statement 3 is true: acid must always be added slowly to water with stirring. Only statement 3 is correct.