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Sagot :
c6h7N, H3O+ are the condition where dominant species present when water pH is 8. Thus, option B is correct.
What does pH value mean?
pH is the negative logarithm value of H+ ion concentration otherwise known as the power of hydrogen.
The pH values range from 0 to 14 if the value is below 7 is acidic and above 7 is basic.
The value of pH 7 is considered as neutral like pure water.
The most common method for measurement of pH is by using pH meter where a pH-sensitive electrode and a reference electrode are used
Thus, option B is correct
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Your question was incomplete, probably the question was
Aniline (c6h7n) has a pkb = 9. 4. what are the dominant species present in water if the ph is held constant at ph = 8?
A. c6h8N+ , H3O+
B. c6h7N , H3O+
C. c6h7N , OH−
D. c6h8N+, OH−
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