In a 10% solution of sodium hypochlorite, what is the percentage of water?

In a 10% solution of sodium hypochlorite, the percentage of water can be determined by understanding that solutions are composed of solute and solvent components. The 10% refers to the concentration of sodium hypochlorite in the solution, meaning that sodium hypochlorite makes up 10% of the total volume, while the solvent, which is typically water in this context, constitutes the remaining percentage.

To find the percentage of water in the solution, you subtract the percentage of sodium hypochlorite from 100%. Therefore, if sodium hypochlorite comprises 10% of the solution, water must account for the other 90% of the solution. This results in the calculation:

100% - 10% = 90% water.

Thus, in a 10% solution of sodium hypochlorite, the water content is indeed 90%, making this the correct answer.