Which one of the following compounds is not a salt?
1. Ca(ClO4)2
2. Fe(NO3)3
3. Cr(OH)3
4. Na2SO3
5. KMnO4
aluminum cockside
Salts are made up of
a. a cation other than H ion.
b. an anion other than hydroxide.
To determine which one of the compounds is not a salt, we need to understand what a salt is.
A salt is an ionic compound that is formed by the combination of a cation (a positively charged ion) and an anion (a negatively charged ion). In a salt, the overall charges of the cations and anions must balance each other.
Now let's analyze each compound:
1. Ca(ClO4)2: This compound consists of the calcium cation, Ca2+, and the perchlorate anion, ClO4-. It follows the definition of a salt.
2. Fe(NO3)3: This compound consists of the iron(III) cation, Fe3+, and the nitrate anion, NO3-. It also follows the definition of a salt.
3. Cr(OH)3: This compound consists of the chromium(III) cation, Cr3+, and the hydroxide anion, OH-. It follows the definition of a salt.
4. Na2SO3: This compound consists of the sodium cation, Na+, and the sulfite anion, SO32-. It also follows the definition of a salt.
5. KMnO4: This compound consists of the potassium cation, K+, and the permanganate anion, MnO4-. It is an example of a compound that is not a salt.
Therefore, the compound that is not a salt is KMnO4.