Question

which of these ions will turn water acidic? a. Cr3+ b. none of the above c....

which of these ions will turn water acidic?

a. Cr3+

b. none of the above

c. Li+

d. Cl3CCOO-

e. Sr2+

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Answer #1

Answer : a) Cr3+

Explanation :

Li+ and Sr2+ are just spectator ions.

Cl3CCOO- is base . so this is not turn water acidic.

[Cr(H2O)6]3+ (aq) + H2O (l)   --------------> [Cr(H2O)5.OH]+2 + H3O+ (aq)

here H3O+ is produced . so this will turn water acidic

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