Answer:
+2.5
Explanation:
So the oxidation number of S in Na2S4O6is +2.5.
Answer is: the solubility of silver oxalate is <span>a. 1.4 × 10-4 m.
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<span>Chemical reaction
(dissociation) of silver oxalate in water:
Ag</span>₂C₂O₄(s) → 2Ag⁺(aq) + C₂O₄²⁻<span>(aq).
Ksp(Ag</span>₂C₂O₄) = [Ag⁺]²·[C₂O₄²⁻<span>].
[C</span>₂O₄²⁻] = x; solubility of oxalate ion.
[Ag⁺] = 2[C₂O₄²⁻<span>] = 2x
1.0·10</span>⁻¹¹ = (2x)² · x = 4x³.
x = ∛1.0·10⁻¹¹ ÷ 4.
x = 1.4·10⁻⁴ M.
Answer:
Concentrated sulfuric acid can perform a dehydration reaction with table sugar. After mixing, the color changes from white to brownish and eventually to black. The expansion of the mixture is the result of vaporization of water and CO2 inside the container.
Hello,
<span>the gas phase is [Ar] 3d^5 4s^2 and since there are five 3d AOs the atom has five unpaired e⁻: (↑)(↑)(↑)(↑)(↑) (Hund's rule)</span>
