The concentration of hydrogen peroxide in an antiseptic solution was determined by titration with 0.0200 M potassium permanganate solution. 20.00 mL of the peroxide
solution were acidified and titrated with the potassium permanganate solution. An
average titre of 18.93 mL was required. The concentration of the hydrogen peroxide in
the solution was ...

2 mole MnO2 : 5 mole H202
A) 0.2366 M
B) 0.5915 M
C) 0.04733 M
D) 0.1183 M

It's a

Ithink the answer is c

Oxygen= 88ghydrogen= 12g

Answer is: the equilibrium  shifts toward the reactants, to the left side of chemical reaction.it is because lead(ii) nitrate dissociates in water: pb(no₃)₂ → pb²⁺(aq) + 2no₃⁻(aq).according to lechatelier's principle, the position of equilibrium moves to counteract thechange (more lead cations, common ion), the position of equilibrium will move so that the concentration ofproducts decrease and concentration of reactants of chemical reaction increase.read more on -