The graph below $($Chlorine Demand Curve$)$ shows the change in chlorine residual as the chlorine dose is increased during

the chlorination of a raw water. Referring to the Chlorine Demand Curve, please answer the following questions:

$($a$)$ The breakpoint occurs at a chlorine dose of $m\frac{g}{L}.$

$($b$)$ The highest concentration of combined chlorine residual occurs at a chlorine dose of $m\frac{g}{L}.$

$($c$)$ A total chlorine residual of $4\mathrm{.}5m\frac{g}{L}$ occurs at a chlorine dose of $m\frac{g}{L}.$

$($e$)$ At a chlorine dose of $5m\frac{g}{L}$ the chlorine demand is $m\frac{g}{L}.$

$($f$)$ Do you expect to have any problems with the formation of Disinfection By$-$Products $($DBPs i$.$e$.$ THMs and HAAs$)?$

You should be able to support your answer using the Chlorine Demand Curve even though you do not have to do this for

the quiz.