How to change the speed of the reaction proceeding according to the equation : 2CO(g) + O2(g) = 2CO2(g), if:

а) given:
[О2] >in 2 times
find:
υ - ?
Solution:
υ = k[CO]2 • [O2]
1) с2(СО) = с1(СО)
2) с2(О2) = с1(О2) • 2
3) υ = k • с1(О2) • 2 = 2 mol/lit•sec.
Answer:  When you increase the concentration of oxygen at 2 times the speed of reaction is increased in 2 times.
б) given:
[СО] >in 2 times
find:
υ - ?
Solution:
υ = k[CO]2 • [O2]
1) с2(СО) = с1(СО) • 22
2) с2(О2) = с1(О2)
3) υ = k • с1(О2) • с1(СО) • 22 = k •4 = 4 mol/lit • sec.
Answer: When you increase the concentration of carbon monoxide at 4 times the speed of reaction is increased in 4 times.