Question

P+O2=?, K+H2O=?, K20+H2O=?, K2O+H3PO4=?, NaOH+H2S=?, BaCl+H2SO4=?. Розставити кофіціенти і валентності

Answer 1

Ответ:

4P+5O₂=2P₂O₅  

2K+2H₂O=2KOH+H₂

K₂O+H₂O=2KOH

3K₂O+2H₃PO₄=2K₃PO₄+3H₂O

2NaOH+H₂S=Na₂S+2H₂O

BaCl₂+H₂SO₄=BaSO₄↓+2HCI

Answer 2

To balance chemical equations, you need to ensure that the number of atoms of each element is the same on both sides of the equation. I'll help you balance the given chemical equations by providing the coefficients and valencies (charges) of the ions involved:

1. P + O2 → P2O5 Phosphorus (P) has a valency of 3, and Oxygen (O) has a valency of 2.

2. K + H2O → KOH Potassium (K) has a valency of 1, and Hydrogen (H) has a valency of 1.

3. K2O + H2O → 2 KOH Potassium oxide (K2O) + Water (H2O) → 2 Potassium hydroxide (KOH)

4. K2O + H3PO4 → K3PO4 + H2O Potassium oxide (K2O) + Phosphoric acid (H3PO4) → Potassium phosphate (K3PO4) + Water (H2O)

5. NaOH + H2S → Na2S + H2O Sodium hydroxide (NaOH) + Hydrogen sulfide (H2S) → Sodium sulfide (Na2S) + Water (H2O)

6. BaCl2 + H2SO4 → BaSO4 + 2 HCl Barium chloride (BaCl2) + Sulfuric acid (H2SO4) → Barium sulfate (BaSO4) + Hydrochloric acid (HCl)

Remember, when balancing chemical equations, you can only change the coefficients of the compounds, not the subscripts. Additionally, always verify that the final equation is balanced by counting the atoms on both sides of the equation to ensure they are equal.