Chemistry · Various concepts of acids and bases (Arrhenius, Bronsted Lowry and Lewis) and their ionization, acid-base equilibria (including multistage ionization) and ionization constants
Which is true statement about ?
Which is true statement about \( \boldsymbol{H}_{2} \boldsymbol{O} \) ?
- A. Hardness can be removed by passing through ion exchange resin
- B. Its pressure can be detected by anhydrous \( C u S O_{4} \)
- C. It is amphoprotic
- D. All of the above
Step-by-step solution
Water is amphiprotic (amphoteric) because it can donate a proton (acting as an acid) or accept a proton (acting as a base). Option A is also true: water hardness (Ca²⁺, Mg²⁺) can be removed by ion exchange resins, but this is a treatment process. Option B is false: anhydrous CuSO₄ is used to detect the presence of water, not pressure. Since only statement C is unequivocally a fundamental property of water, it is the best correct option.
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