Chemistry Practice Problems Ionic Salts Practice Problems Solution: 1. For Mn3+, write an equation that shows how the ...

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Solution: 1. For Mn3+, write an equation that shows how the cation acts as an acid.2. For C5H5NH+, write an equation that shows how the cation acts as an acid.

Problem

1. For Mn3+, write an equation that shows how the cation acts as an acid.

2. For C5H5NH+, write an equation that shows how the cation acts as an acid.

Solution

To determine if a cation would produce a neutral or acidic solution in water, we will follow this set of rules.


For cations

• transition metal

▪ charge of +2 or higher → acidic

▪ less than +2 → neutral solution

• main group metal

▪ charge of +3 or higher → acidic

▪ less than +3 → neutral solution 

• amines - compounds with only nitrogen or hydrogen (i,e. NH3) or with carbon, nitrogen and hydrogen

▪ positive amines → acidic

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