Chemical Forums
Chemistry Forums for Students => High School Chemistry Forum => Topic started by: sweetnothings on September 01, 2009, 09:21:44 AM
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- change in mass
- volume of gas produced
- pH change
-electrical conductivity
- change in colour intensity (absorption of light)
- pressure
For each of the methods for determining the rate of a chemical reaction, suggest a major source of error. Try to identify whether they are random or systematic errors.
I'm being really thick here, can anyone help me out? Thanks.
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My suggestion would be:
1. Ignore this is a rate question and investigate in your textbook and online what types of error are possible for the different types of measurement - for example what types of error you can get and the sources of the errors when measuring mass. There are different apparatus for measuring mass - each with differing issues about usability, accuracy and resolution of measurement.
2. Now think that when trying to determine rate that what you are measuring may be changing. What are the issues when trying to measure and record a quantity whose value is changing as time passes? Are particular types of apparatus better or worse at measuring changing values for example how quickly the apparatus responds to change in measured quantity.