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m 5 14
b 2 7 4 6
s 3 7 4 6
M C2H6 = mol ÷ V ⇒ 2 ÷ 2 = 1
V C2H6 = M C2H6 ÷ waktu ⇒ 1 ÷ 30 = 0,033 M/s
M O2 = 7 ÷ 2 = 3,5
V O2 = 3,5 ÷ 30 = 0,01167 M/s
M CO2 = 4 ÷ 2 = 2
V CO2 = 2 ÷ 30 = 0,067 M/s
M H2O = 6 ÷ 2 = 3
V H2O = 3 ÷ 30 = 0,1 M/s
6. [NO] [Br2] laju reaksi
a b v
2a b 4v
a 3b 3v
orde reaksi NO = V2 ÷ V1 ⇒ [2a/a]^x = 4v/v
2^x = 4
x = 2
orde reaksi Br2 = V3 ÷ V1⇒ [3b/b]^y = 3v/v
3^y = 3
y = 1
persamaan laju reaksi: V = K [NO]^2 [Br2]
7. mol NO setelah 60% adalah 60/100 × 2 = 1,2
2 NO + Br2 → 2 NOBr
m 2 2
b 1,2 0,6 1,2
s 0,8 1,4 1,2
M NO = mol ÷ V = 1,2 ÷ 4 = 0,3
M Br2 = 0,6 ÷ 4 = 0,15
V = 0,4 [NO]^2 [Br2]
= 0,4 [0,3]^2 [0,15]
= 5,4 × 10^-3 M/menit