[計量] PP PS 142
The rate of a certain chemical reaction is directly proportional to the
square of the concentration of chemical A present and inversely proportional
to the concentration of chemical B present. If the concentration of chemical
B is increased by 100 percent, which of the following is closest to the
percent change in the concentration of chemical A required to keep the
reaction rate unchanged?
(A) 100% decrease
(B) 50% decrease
(C) 40% decrease
(D) 40% increase
(E) 50% increase
由題目可知
反應速率與A濃度的平方成正比，與B濃度的一次方成反比
可是當B增加 100% 增增加多少 這是要怎麼列式+運算?
精華區裏面 有大大提到
"反應速率~{[A]^2}/[B] 當[B]增加100% 則[A]需增加(√2-1)"
想請問 "(√2-1)" 怎麼來的?
小的比較笨 有勞各位大大教導了
也先謝過了
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