An acetic acid buffer containing 0. 50 m ch3cooh and 0. 50 m ch3coona has a ph of 4. 74. What will the ph be after 0. 0020 mol of hcl has been added to 100. 0 ml of the buffer?.

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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.