Buffers are important in various applications such as food and consumer products. Contact lens solution has a pH of 7.03. After adding 5.30 mL of 0.1018 M NaOH to 40.0 mL of the extract solution, the pH rose to 8.09. Calculate the change in pH due to the addition of NaOH. Answer in an absolute value. Pay attention to significant figures.

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.

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