From the proposed substances, select those that react with water, write down the equations of possible
From the proposed substances, select those that react with water, write down the equations of possible reactions. List of substances: calcium, calcium oxide, sulfur, iron (III) oxide, potassium oxide, iron, gold, lithium oxide, lead (IV) oxide, silver, sodium chloride, oxygen.
Interact:
1) Ca + 2 H2O => Ca (OH) 2 ↓ + H2 ↑
2) CaO + H2O => Ca (OH) 2 ↓
3) K2O + H2O => 2 KOH
4) 3 Fe + 4 H2O => Fe3O4 + 4 H2 ↑
5) Li2O + H2O => 2 LiOH
Do not interact:
1) sulfur is a non-metal (only halogens (chlorine, iodine, bromine) and carbon can interact with water)
2) iron (III) oxide – amphoteric oxide
3) gold – in the line of activity it is located after hydrogen
4) lead (IV) oxide – amphoteric oxide
5) silver – in the line of activity it is located after hydrogen
6) sodium chloride – does not interact, but dissolves in water, since it is a salt
7) oxygen is a non-metal (only halogens (chlorine, iodine, bromine) and carbon can interact with water)