Solve it now. Solve it now. Solve it now. Strict warning: No AI whatsoever. CC$02$

$$B$$n $$ang l$$m vi$$c t$$i m$$t nh$$ m$$y x$$ l$$ n$$c th$$i v$$ b$$n $$c giao nhi$$m v$$ thi$$t k$$

m$$t l$$ ph$$n $$ng theo m$$ lo$$i b$$ ch$$t $$ nhi$$m $"$X$"$ kh$$i n$$c ch$$y v$$o$.$ Ch$$t g$$y $$ nhi$$m $""$X$""$

tu$$n theo $$ng h$$c ph$$n $$ng b$$c nh$$t$.$

B$$n c$$n thi$$t k$$ l$$ ph$$n $$ng theo m$,$ bi$$t r$$ng n$$ng $$ ch$$t $$ nhi$$m ban $$u

X $($CXO$)$ l$100$ mg$/$L v$$ b$$n mu$$n $$t $$c n$$ng $$ cu$$i c$$ng l$5$ mg$/$L sau $30$

ph$$t ph$$n $$ng$.$

$1\mathrm{.}1$ Suy ra ph$$ng tr$$nh ph$$n $$ng m$$ b$$c nh$$t$.$

$1\mathrm{.}2$ T$$nh to$$n th$$ t$$ch l$$ ph$$n $$ng c$$n thi$$t$.$

$1\mathrm{.}3$ So s$$nh l$$ ph$$n $$ng theo m$$ v$$i l$$ ph$$n $$ng b$$ b$$c thang li$$n t$$c

$(12)$

$($s$8)$

$(6)"$