Question

Permanganate ion oxidizes hydrogen peroxide in acidic solution according to the following equation:
2 MnO₄^–(aq) + 5 H₂O₂(aq) + 6 H⁺(aq) 2 Mn²⁺(aq) + 5 O₂(g) + 8 H₂O(l)
If 35.0 mL of an acidic 0.150 M KMnO₄ solution is required to consume all the H₂O₂ in 50.0 mL of a disinfectant solution, what is the concentration of H₂O₂ in the disinfectant?

		0.0420 M
		0.105 M
		0.263 M
		0.368 M

When a solution of barium hydroxide is mixed with a solution of iron(III) chloride, what is observed?

		Precipitation of a colored solid
		Precipitation of a colorless solid
		Evolution of a colorless gas
		Neither precipitation nor gas evolution

What is the coefficient for H+(aq) when the equation is balanced with whole number coefficients?        
__Mn²⁺(aq) + __BiO₃^-(aq) + __H⁺ (aq) → __Bi³⁺(aq) + __MnO^4–(aq) + __H₂O(l)

a 3

b 14

c 4

d 7