Predict the pH of a 0.0050 M solution of a weak, polyprotic acid.
Ka, = 4.3 x 10-7
Ka, = 5.6 x 10-11
pH = [?]

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Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.

Where is the following?