The Ka value for acetic acid, CH3COOH(aq), is 1.8×10−5. 1. Calculate the pH of a 2.60 M acetic acid solution.

2. Calculate the pH of the resulting solution when 4.00 mL of the 2.60 M acetic acid is diluted to make a 250.0 mL solution.

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answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

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