What is the name for $ K{C_2}{H_3}{O_2} $ ?

Hint: Potassium acetate exists as a crystalline solid which is mild soluble in water as solvent. When we apply heat on the potassium acetate then it will undergo the process of thermal decomposition to form potassium oxides.

Complete answer:
The compound $ K{C_2}{H_3}{O_2} $ contains basically three types of atoms including potassium, oxygen, carbon and hydrogen. As we know, the chemical formula of acetate which is formed by removal of hydrogen atoms from acetic acid is $ {C_2}{H_3}{O_2} $ . When we add potassium with acetate ion it is collectively known as potassium acetate.
When we treat the acetic acid solution with the potassium hydroxide solution then they react with each other to form a salt of potassium which is commonly known as potassium acetate.
\[C{H_3}COOH{\text{ }} + {\text{ }}KOH \to C{H_3}COOH + {H_2}O\]
Hence, we can consider potassium oxide as potassium salt or acetic acid. Potassium acetate is also prepared by treating acetic acid with potassium carbonate.
Potassium acetate exists as a hygroscopic solid under the normal room temperature because it has a tendency to absorb the moisture from the atmosphere.
Chemical structure of potassium acetate is –

Hence, the name for $ K{C_2}{H_3}{O_2} $ is potassium acetate.

Note:
Potassium acetate is widely used as a source of potassium which is administered to treat the medical condition known as hypokalemia which is associated with lower blood level of potassium in the body. Potassium acetate is known by some other names such as potassium ethanoate or acetic acid potassium salt.