What's the formula for potassium sulfate?

1 Answer
Jun 5, 2018



Potassium: #"K"^+#

Sulfate: #"SO"_4^(2-)#

We can't just combine them as it is, since potassium and sulfate have different charges. We need to equalize charges by criss-crossing the charges, like this example:
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Following this image, we know that since potassium has just 1 positive charge , then there is just 1 molecule of sulfate.

Also, sulfate has a negative 2 charge, so there will be 2 atoms of potassium.

This can be written out as:

Hope this helps!