Substance C under the influence of different volumes of potassium hydroxide solution can turn into two acid salts D and E and crystal hydrate F (three different reactions).
Thermal decomposition of equal quantities of these substances of three salts passes with the release of water (mole ratio is 2:1:14) and the formation of three various salts G, H, I.
1. Identify unknown substances. Formula of substance H is KxA2O(x+3), and the mass fraction of A in that substance is 18.8%.
2. Write the equation of the reactions mentioned in the condition above.
3. Name the salts G, H and I.
4. How does A interact with an insufficient amount of oxygen?
5. Write the reaction equation of interaction between A and: a) metal; b) non-metal; c) acid; d) salt.