Homework Help!
What technologies are available to determine the acidity of a solution?
These days we have electronic pH meters. These work by sticking an electrode in a solution and measuring the current that flows, and hence the ions present. Most use glass membranes to only let H+ ions in.
You can calibrate these by sticking them in a buffer solution of known pH.
They are pretty quick and easy to use, and give fairly accurate readings.
We also have pH paper and indicators- indicators change colour at a certain pH. By combining indicators, you can establish a pH range.
December 3rd, 2009 at 4:42 am
One of the most basic is just using pH paper. It is a special paper coated in an indicator chemical which alters its color based on how many H+ ions are in the substance. You can also use an indicator that measures H+ ion levels in liquids. It doesn’t require much technology but I believe there are some higher tech pH tester, I just don’t know of any.
References :
December 3rd, 2009 at 5:02 am
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References :
December 3rd, 2009 at 5:34 am
These days we have electronic pH meters. These work by sticking an electrode in a solution and measuring the current that flows, and hence the ions present. Most use glass membranes to only let H+ ions in.
You can calibrate these by sticking them in a buffer solution of known pH.
They are pretty quick and easy to use, and give fairly accurate readings.
We also have pH paper and indicators- indicators change colour at a certain pH. By combining indicators, you can establish a pH range.
References :