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2 May, 15:46

Which of the following 0.5 M aqueous salt solutions will have a pH of 7.0 at

LiF RbBr NaClO4 NH4Cl

A) LiF only B) NaClO4 only C) LiF and RbBr D) RbBr and NaClO4

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Answers (1)
  1. 2 May, 16:14
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    LiF and RbBr

    Explanation:

    Salt is an ionic compound that is made from the reaction of an acid and a base solution. Salts dissolve in water to give solutions that are acidic, basic, or neutral.

    Salt formed from a strong acid and a weak base will make an acidic solution when added to water. The reason this occurs is because when the salt dissociates, the conjugate acid of the weak base will donate a proton, or one hydrogen ion, to water and form hydronium ion.

    If a salt is formed from a weak acid and a strong base, it dissolves in water and the conjugate base of the weak acid will accept a proton from water and yield the hydroxide ion. Hence the solution of the salt will be basic.

    If the salt is formed from a strong acid and a strong base, the salt is neutral when dissolved in water. Both LiF and RbBr are formed from strong acids and strong bases hence they will have a pH of 7.0 in solution.
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