Question

Describe how you would prepare 500ml of 40% (w/v) aqueous iodine solution.

[Atomic mass of iodine =127g/mol].​

Answer 1

- Weight 333.3 grams of iodine.

- Measure 500 mL of water.

- Vigorously mix the resulting solution.

Step-by-step explanation:

Hello,

In this case, since 500 mL of a 40% (w/v) aqueous solution iodine is required, we can compute the required mass of iodine by defining the given mass-volume percent:

`\% w/v=(m_(iodine))/(m_(solution)) *100%=(m_(iodine))/(m_(water)+m_(iodine)) *100%`

In such a way, we need to find mass of iodine, which is computed as:

`m_(iodine)=(\%w/v*m_(water))/(100w/v-\%) \\\\m_(iodine)=(40*500)/(100-40)\\ \\m_(iodine)=333.3g\\`

Thereby, the procedure will be:

- Weight 333.3 grams of iodine.

- Measure 500 mL of water.

- Vigorously mix the resulting solution.

Best regards.