Which is the correct formula for potassium carbonate?

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Multiple Choice

Which is the correct formula for potassium carbonate?

Explanation:
Balancing charges in ionic compounds is the key idea. The carbonate ion has a 2− charge (CO3^2−) and potassium forms a +1 ion (K+). To make a neutral compound, you need two K+ for every CO3^2−, giving K2CO3. The other formulas don’t balance the charges correctly or use the wrong ion type, so they don’t represent potassium carbonate.

Balancing charges in ionic compounds is the key idea. The carbonate ion has a 2− charge (CO3^2−) and potassium forms a +1 ion (K+). To make a neutral compound, you need two K+ for every CO3^2−, giving K2CO3. The other formulas don’t balance the charges correctly or use the wrong ion type, so they don’t represent potassium carbonate.

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