What's the formula for potassium sulfate?

1 Answer
Jun 5, 2018

Answer:

#"K"_2"SO"_4#

Explanation:

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:
enter image source here

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:
#"K"_2"SO"_4#

Hope this helps!