You are contracted by the United Nations Environmental Program $($UNEP$)$ to evaluate the suitability

of the water of a river, passing through a small town in India, for drinking. The first thing you do is to

have the river water analyzed. The chemist hands you the following result and all the constituents are

totally dissolved in the water:

Temperature: $25$ C

Species Concentration, mg$/$L Species Concentration, mg$/$L

Ca $15$ Carbonate $0\mathrm{.}0085$

Sulfate $11\mathrm{.}2$

Na $6\mathrm{.}3$ Chloride $7\mathrm{.}8$

K $2\mathrm{.}3$ Nitrate $1$

Silica $($Sio$2)13\mathrm{.}1$

HCO$358\mathrm{.}4$

You now must evaluate the water quality parameters. Here are the results of your evaluation:

a$.$ Total hardness $------------------------------------$mg$/$L$.$

b$.$ Total Dissolved Solids$--------------------------------$mg$/$L$.$

c$.$ Alkalinity $-----------------------------------------------$ mg$/$L$.$

Please Note: For this problem, you must know the definition of hardness, the definition of Alkalinity

and the definition of TDS $($Total Dissolved Solids$).$