$2\mathrm{.}2.$ Two small lakes having approximately the same volume, surface area, and

throughput are exposed to quite different amounts of "acid rain". Both lakes have

volume $={10}^7{m}^3,$ surface area $={10}^6{m}^2,$ and an average throughout of ${2\mathrm{.}5}^{*}{10}^6\frac{m^3}{?}$ lyear.

One lake is located in the heart of South Africa's coal$-$burning region in Mpumalanga. It

has an average acid input equivalent to ${22}^{*}{10}^{5}kg{H}_{2}S{O}_4$ year. The second lake is in

the Northern Cape, and it is also exposed to acid rain, but at a lower rate, ${7\mathrm{.}35}^{*}{10}^{2}kg$

$H_{2}S\frac{O_4}{?}$ year. The streams feeding the lakes have natural alkalinities of $200m\frac{g}{L}$ as

$CaC{O}_5$ for Mpumalanga and $40m\frac{g}{L}$ as $CaC{O}_3$ for the Northern Cape. Which lake is at

a greater risk of being acidified? Quantify your answer of course.