What is the molarity of a potassium triiodide solution, ki3(aq), if 30.00 ml of the solution is required to completely react with 25.00 ml of a 0.200 m thiosulfate solution, k2s2o3(aq)? the chemical equation for the reaction is 2 s2o32-(aq) + i3-(aq) → s4o62-(aq) + 3 i-(aq). what is the molarity of a potassium triiodide solution, ki3(aq), if 30.00 ml of the solution is required to completely react with 25.00 ml of a 0.200 m thiosulfate solution, k2s2o3(aq)? the chemical equation for the reaction is 2 s2o32-(aq) + i3-(aq) → s4o62-(aq) + 3 i-(aq). 0.167 m 0.333 m 0.120 m 0.0833 m?

The molar concentration of the KI_3 solution is 0.0833 mol/L.

Step 1. Calculate the moles of S_2O_3^(2-)

Moles of S_2O_3^(2-) = 25.00 mL S_2O_3^(2-) ×[0.200 mmol S_2O_3^(2-)/(1 mL S_2O_3^(2-)] = 5.000 mmol S_2O_3^(2-)

Step 2. Calculate the moles of I_3^(-)

Moles of I_3^(-) = 5.000 mmol S_2O_3^(2- × [1 mmol I_3^(-)/(2 mmol S_2O_3^(2-)] = 2.500 mmol I_3^(-)

Step 3. Calculate the molar concentration of the I_3^(-)

c = "moles"/"litres" = 2.500 mmol/30.00 mL = 0.083 33 mol/L

0.083 M

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.

moles of

According to stoichiometry: 2 moles of require 1 mole of

Thus require= moles of

Thus Molarity of

the correct answer is a

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.