HW F11

[Lauryn Shinno 2H]

For part c, I got NH6PO4, which is correct. However, the answer says NH6PO4 or [NH4][H2PO4]. How do you convert NH6PO4 into [NH4][H2PO4] and do we have to know this?

[Diana Bibireata 1B]

NH₄⁺ (ammonium) and H₂PO₄^- (dihydrogen phosphate) are polyatomic ions which is why they wrote it like that.

[Alicia Gibbons 1B]

When polyatomic ions are involved in reactions, they stay together. For example, carbonate as a reactant will become carbonate as a product. That's something you should know when calculating reactions, since the charge of the polyatomic ion will determine the needed amount of whatever's attached to it.

[inlovewithchemistry]

Just wondering, is it important that we learn all of the polyatomic ions for the first test/subsequent tests? I know a few, but is there a list somewhere of ones we should memorize or something? Thanks!

[404536963]

I think the professor said that we don't need to know polyatomic ions as of right now, and not for the first test. We may go further in depth about them later in class, though.