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Hydrolysis of Feldspar

Martha Mamo Author
11/02/2018 Added
93 Plays

Description

Chemical weathering: hydrolysis of feldspar.

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  • [00:00:06.440]This experiment illustrates that relatively insoluble minerals will react
  • [00:00:12.762]with water if sufficient surface area is produced.
  • [00:00:18.440]We start by placing a small amount of ground fell apart in the mortar.
  • [00:00:24.440]Then we add several drops of water and several drops of red pH indicator.
  • [00:00:38.080]The colour is yellow orange, indicating aph of less than 7 according
  • [00:00:47.175]to the chart below.
  • [00:00:52.480]We then grind feldspar into a finer powder.
  • [00:00:56.160]Notice the final purplish colour indicating aph of 7.8 or greater.
  • [00:01:06.920]This indicates a splitting of water and release of hydroxide which is wage into a
  • [00:01:14.713]soil solution or into the solution.
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