A 10% bleach solution for disinfecting countertops can be prepared by: a. weighing the bleach and the water b. weight to volume percentage c. adding 10 mL bleach to 90 mL water d. adding 10 mL bleach to 990 mL water

The correct answer is - c. adding 10 mL bleach to 90 mL water.

Explanation:

To prepare a effective disinfecting solution to clean the countertops is a bleasce solution of 10% solution of bleach. The ten percent of the bleach solution means there are one volve of bleach and 9 volume of clean water in this solution.

So, preparing the 1/10 or ten percent solution is where adding 10 ml of bleach which is diluted to 90 ml clean water. This diluted solution can be use as disinfecting solution.