Answer:
NH₃ is bitter and has a pH above 7
Acids and Bases:
Compounds that have a pH above 7 are known as bases. Properties of bases include:
- taste bitter
- neutralise acids
- turn red litmus blue
Compounds that have a pH below 7 are known as acids. Properties of acids include:
- taste sour
- neutralise bases
- turn blue litmus red
The first three compounds are acids. Their names are:
Phosphoric acid (H₃PO₄)
Nitric acid (HNO₃)
Hypochlorous acid (HClO)
The fourth compound is a ammonia (NH₃) which is a common base and therefore has a pH above 7, and tastes bitter.