The pka values of a compound with two ionizable groups are pk1 = 4. 10 and pk2 between 7 and 10. A biochemist has 10 ml of a 1. 0 m solution of this compound at a ph of 8. 0. She adds 10. 0 ml of 1. 00 m hcl, which changes the ph to 3. 20. What is pk2?.

Yes but weres the problem i will be glade to

Eoc`s is answer  hope it !

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Which of the following is an example of an opposing signal? no examplthates given.   i would say, that traffic lights in a city at major intersections direct the flow of traffic in opposite directions so would be an example.also, stop signs on either side of the same street would be an example. at a train crossing, the light for allowing car traffic in opposite directions or not would be another example.