The greater vancouver regional district (gvrd) chlorinates the water supply of the region at the rate of 1 ppm, that is, 1 kilogram of chlorine per million kilograms of water. the chlorine is introduced in the form of sodium hypochlorite, which is 47.62% chlorine. the population of the gvrd is 1.8 million persons. if each person uses 750 l of water per day, how many kilograms of sodium hypochlorite must be added to the water supply each week to produce the required chlorine level of 1 ppm?

2835 kilograms of sodium hypochlorite must be added to the water supply each week to produce the required chlorine level of 1 ppm.

Explanation:

Volume of water used by 1 person =  750 L

Volume of water used by 1.8 million persons : V

Density of water,d = 1 kg/L

Mass of water used by 1.8 million persons =  m

1 kilogram of chlorine per million kilograms of water. (Given)

Concentration of chlorine in water = 1 kg/ 1000,000 kg of water

In 1000,000 kg of water = 1 kg of chlorine

Then of water have x mass of chlorine:

Mass of chlorine in water of mass  

Percentage of chlorine in hypochlorite = 47.62%

Total mass of sodium  hypochlorite =

2835 kilograms of sodium hypochlorite must be added to the water supply each week to produce the required chlorine level of 1 ppm.

i do not get it   at all