Molarity of bleach solution

Chemistry Level 2

25 mL of household bleach solution was mixed with 30 mL of 0.50 M KI and 10 mL of 4 N acetic acid. In the titration of the liberated iodine, 48 mL of 0.25 N N a 2 S 2 O 3 Na_2S_2O_3 was used to reach the end point. The molarity of the household bleach solution is

0.96 M 0.024 M 0.48 M 0.24 M

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