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Both buffer solutions have the same acid to conjugate-base
mole ratio in the formula below.
[H+] = Ka [HC2H3O2 ]
⎡ C2 H 3 O 2 − ⎤
⎦ One point is earned for the correct
answer involving ratio of acid
to base in the buffer. Therefore, the buffers have the same [H+] and pH. © 2007 The College Board. All rights reserved.
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2007 SCORING GUIDELINES (Form B)
1,000 Element 1
Element 4 Second Ionization
2,250 Third Ionization
3,360 The table above shows the first three ionization energies for atoms of four elements from the third period of the
periodic table. The elements are numbered randomly. Use the information in the table to answer the following
(a) Which element is most metallic in character?...
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This note was uploaded on 10/01/2009 for the course OC 9876 taught by Professor Dq during the Spring '09 term at UC Merced.
- Spring '09