Pertanyaan

UN 2011 No. 28 Berikut ini diberikan percobaan laju reaksi: Q (g) + 2T (g) → T 2 Q (g) pada beberapa kondisi: No. [Q] [T] V (M/det) 0,1 0,1 1,25 x 10 -2 0,2 0,1 5 x 10 -2 0,1 0,2 0,1 Jika [Q] dan [T] masing-masing diubah menjadi 0,5 M, maka harga laju (V) reaksi saat itu adalah… M/det

UN 2011 No. 28

Berikut ini diberikan percobaan laju reaksi:

Q (g) + 2T (g) $\to$ T₂Q (g) pada beberapa kondisi:

No.	[Q]	[T]	V (M/det)
	0,1	0,1	1,25 x 10^-2
	0,2	0,1	5 x 10^-2
	0,1	0,2	0,1

Jika [Q] dan [T] masing-masing diubah menjadi 0,5 M, maka harga laju (V) reaksi saat itu adalah… M/det

5,0
7,5
10,5
12,5
39,0

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Pembahasan

$begin mathsize 12px style v subscript 3 over v subscript 1 space equals space fraction numerator begin display style open square brackets A close square brackets to the power of p open square brackets B close square brackets to the power of q end style over denominator open square brackets A close square brackets to the power of p open square brackets B close square brackets to the power of q end fraction fraction numerator 1 space cross times space 10 to the power of negative 1 end exponent over denominator 1 comma 25 space cross times space 10 to the power of negative 2 end exponent end fraction space equals space fraction numerator begin display style horizontal strike open square brackets 0 comma 1 close square brackets to the power of p end strike open square brackets 0 comma 2 close square brackets to the power of q end style over denominator horizontal strike open square brackets 0 comma 1 close square brackets to the power of p end strike open square brackets 0 comma 2 close square brackets to the power of q end fraction 8 space equals space 2 to the power of p 2 cubed space equals space 2 to the power of p q space equals space 3 fraction numerator begin display style v subscript 2 end style over denominator begin display style v subscript 1 end style end fraction space equals space fraction numerator begin display style open square brackets A close square brackets to the power of p open square brackets B close square brackets to the power of q end style over denominator open square brackets A close square brackets to the power of p open square brackets B close square brackets to the power of q end fraction fraction numerator 5 space cross times space 10 to the power of negative 1 end exponent over denominator 1 comma 25 space cross times space 10 to the power of negative 2 end exponent end fraction space equals space fraction numerator begin display style open square brackets 0 comma 2 close square brackets to the power of p horizontal strike open square brackets 0 comma 1 close square brackets to the power of q end strike end style over denominator open square brackets 0 comma 2 close square brackets to the power of p begin display style space end style begin display style horizontal strike open square brackets 0 comma 1 close square brackets to the power of q end strike end style end fraction 4 space equals space 2 to the power of p 2 squared space equals space 2 to the power of p p equals space 3 end style$

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