Answer:
the mass percentage of water of crystallization in washing soda is 62.9 %.
Explanation:
I would say A. Sulfur dioxide. Local coal burning power plants have been known to change the color of the sky.
Answer:
B) 0.59 M NaCl.
Explanation:
- It is known that the no. of millimoles of NaCl before dilution = the no. of millimoles of NaCl after dilution.
∵ (MV) before dilution = (MV) after dilution.
<em>∴ M after dilution = (MV) before dilution / V after dilution </em>= (3.2 M)(25.0 mL)/(135.0 mL) = <em>0.5926 M ≅ 0.59 M.</em>
Answer:
Kₐ = 9.9 × 10⁻³
Explanation:
HClO₂ + H₂O ⇌ H₃O⁺ + ClO₂⁻
0.080 × 1.43 = 0.1144
So, at equilibrium,
[H₃O⁺] = [ClO₂⁻] = 0.1144
[HClO₂] = 1.43 – 0.1144 = 1.316
Kₐ = {[H₃O⁺][ClO₂⁻]}/[HClO₂]; Substitute values
Kₐ = (0.1144 × 0.1144)/1.316 Do the operations
Kₐ = 9.9 × 10⁻³
