What is the formula of potassium oxalate?

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$K_{2} O_{4}$

$K_{2} C O_{4}$

$K_{4} C_{2} O_{2}$

$K_{2} C_{2} O_{4}$

answer is D.

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Detailed Solution

Potassium ion is $K^{+ 1}$ . The oxalate ion is ${(C_{2} O_{4})}^{- 2}$ . Keeping in mind that the compound formed will have zero net charges and using the criss-cross method, the formula of potassium oxalate is $K_{2} C_{2} O_{4}$ .

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