Aqueous Solutions of Many Metal Cations Have a PH Different

question 38

Multiple Choice

Aqueous solutions of many metal cations have a pH different from 7. Which one of the following statements about these cations is not correct?

• A)Alkali metal cations such as Na ^ and K ^ have a negligible effect on the pH.
• B)Small and highly charged main group metals such as Al^{3 } produce acidic aqueous solutions.
• C)For transition metal cations, the cation with the higher oxidation state produces more acidic solution; for example, Fe^{3 } (aq) is more acidic than Fe^{2 } (aq).
• D)A solution containing Cr^{2 } is expected to be considerably more acidic than a solution of equal concentration containing Ni^{2 } .
• E)The Lewis acidity of a metal cation is a good measure of its ability to activate a water molecule to lose a proton and produce a hydronium ion.

Comprehend the impact of linguistic and extralinguistic cues on sentence comprehension, including garden path sentences.

Explore the influence of language on attention and perception.

Understand the relationship between language and the external environment.

Gain insight into sentence ambiguity and its potential sources.

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