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Results taking technique?!! (quick question)

I'm having to record the rate of gas produced from the simple reaction between sulphuric acid and magnesium.

I original way of recording results was to quickly write down the gas reading on the gas syringe every 5 seconds. But, at some concentrations, the gas is made so quickly that I find it hard to quickly read off the syringe scale and add to my results table every 5 seconds.

I came up with another idea. I use my iphone timer to record the time(s) when the gas reaches a multiple of 10. This way is much easier as I only have to press the 'lap' button while still looking at the gas syringe reading.
The results I get with this seem ok and show differences in reaction rates quite well.
Does this sound like a good idea?
Have I missed something that wont allow me to work out order of reaction, arrhenious equation, etc?

Thanks
Reply 1
Avatar for Borek
Borek
4
Sounds good to me. While these will be not exactly the same data, in the end they should give the same results.

But: if you are already using iPhone, why don't take take a picture of the syringe every 5 seconds?

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