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An unknown salt is either KBr, NH4Cl, KCN, or K2CO3. If a 0.100 M solution of the salt is neutral, what is the identity of the salt?

1 Answer

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Answer:

KBr

Step-by-step explanation:

In order to find out the identity of the salt, we first need to consider the ions that make up the salt, and whether those ions came from strong or weak acids or bases.

To attain a neutral salt, there must be both a component of a strong acid and a component of a strong base in the salt.

KOH is a strong base. Thus, any salt with a K has a cation that came from a strong base.

HBr is a strong acid. Thus, any salt with a Br has an anion that came from a strong acid.

Putting these two together, we get that our neutral salt is KBr.

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